1、原文Why Do Some Animals Hibernate?From Britannica 255words 3 mins Certain animals hibernate because food supplies become scarce during the winter months. By going into a long deep sleep, they bypass this period completely, waking up when food becomes more plentiful.Bears are most commonly associated w

2、ith hibernation (although they arenot considered true hibernators, because their body temperaturedoesnt lower significantly), but a variety of animals take advantage ofthis evolved adaptation, including the jumping mouse, little brown bat, eastern chipmunk, woodchuck, and certain species of ground s

3、quirrels. At least one bird is known to be a hibernatorthe poorwill, which lives in western North America.It is believed that a compound in the blood of hibernators known as HIT(Hibernation Induction Trigger) lets animals know when its time toprepare for hibernation. Shorter days, diminishing food s

4、upplies, andcolder temperatures all appear to influence HIT, though the exactmechanism remains a mystery.Hibernators tend to eat a lot of extra food in the fall in anticipation of their winter slumber and build significant stores of white and brown body fat to tide them over. Brown fat provides extr

5、a body heat as well as needed energy when the animal wakes up. Some animals also store food in their dens to consume during brief periods of wakefulness.rate slow dramatically. The effect can be so extreme that a hibernating animal may appear dead.Hibernation is nothing like a regular nights sleep.

6、In fact, significant physical changes occur within the body during the hibernation period. An animals body temperature plunges, and its respiration and heart翻譯Why Do Some Animals Hibernate?為什么有些動(dòng)物會(huì)冬眠?From Britannica 255words 3 mins Certain animals hibernate because food supplies become scarce during

7、 the winter months. By going into a long deep sleep, they bypass this period completely, waking up when food becomes more plentiful.Bears are most commonly associated with hibernation (although they arenot considered true hibernators, because their body temperaturedoesnt lower significantly), but a

8、variety of animals take advantage ofthis evolved adaptation, including the jumping mouse, little brown bat, eastern chipmunk, woodchuck, and certain species of ground squirrels. At least one bird is known to be a hibernatorthe poorwill, which lives in western North America.It is believed that a comp

9、ound in the blood of hibernators known as HIT(Hibernation Induction Trigger) lets animals know when its time toprepare for hibernation. Shorter days, diminishing food supplies, andcolder temperatures all appear to influence HIT, though the exactmechanism remains a mystery.Hibernators tend to eat a l

10、ot of extra food in the fall in anticipation of their winter slumber and build significant stores of white and brown body fat to tide them over. Brown fat provides extra body heat as well as needed energy when the animal wakes up. Some animals also store food in their dens to consume during brief pe

11、riods of wakefulness.rate slow dramatically. The effect can be so extreme that a hibernating animal may appear dead.某些動(dòng)物冬眠是因?yàn)槎臼澄锕?yīng)不足。它們通過(guò)長(zhǎng)時(shí)間深度睡眠避開(kāi)整個(gè)冬季，Hibernation is nothing like a regular nights sleep. In fact, significant physical changes occur within the body during the hibernation period. An an

12、imals body temperature plunges, and its respiration and heart食物豐富時(shí)再醒來(lái)。熊通常與冬眠聯(lián)系在一起（雖然人們并不認(rèn)為熊是真正的冬眠動(dòng)物，因?yàn)樗鼈兊捏w溫并沒(méi)有明顯降低），但是很多動(dòng)物都利用了這種進(jìn)化的適應(yīng)能力，包括跳鼠、小棕蝙蝠、東方花栗鼠、土撥鼠，和某些種類(lèi)的地松鼠。至少有一種鳥(niǎo)被認(rèn)為是冬眠動(dòng)物即生活在 洲西部的小夜鷹。會(huì)影響 HIT，盡管其確切機(jī)制仍是個(gè)謎。冬眠動(dòng)物預(yù)感自己要進(jìn)入冬眠時(shí)，它們往往會(huì)在秋天吃很多額外的食物，積累大量的白色和棕色身體脂肪來(lái)度過(guò)難關(guān)。醒來(lái)時(shí)，棕色脂肪提供額外的體溫和所需能量。一些動(dòng)物還會(huì)在巢穴里儲(chǔ)存食物

13、，以便在短暫的清醒期食用。冬眠和正常的夜間睡眠完全不同。事實(shí)上，在冬眠期間，動(dòng)物的身體會(huì)發(fā)生重大的生理變化。它們會(huì)體溫驟降，呼吸、心率急劇減慢。這種影響非常嚴(yán)重，以致于冬眠動(dòng)物可能會(huì)死亡。講義知識(shí)積累Why Do Some Animals Hibernate?hibernate/habrnet/v. 冬眠；蟄居釋義：to spend the winter in a state like deep sleep例句：Dormice hibernate from October to May.gliders out again.相關(guān)：hibernationCertain animals hibern

14、ate because food supplies become scarce duringThe pilots who have been hibernating during the winter months get theirthe winter months. By going into a long deep sleep, they bypass this period completely, waking up when food becomes more plentiful. scarce/skers/adj. 缺乏的，不足的用法：make oneself scarce躲開(kāi)，溜

15、走搭配：scarce resources稀缺資源近義：rare; short; lacking; insufficient; deficient scarce (=scarcely)adv. 幾乎不；簡(jiǎn)直不例句：I can scarce remember him.句式：scarcely/hardly when一就bypass/baps/v. 繞過(guò)；避開(kāi)例 句 ：The rebel forces simply bypassed the town on their way further south.近義：detourbypassv. (為了更快地達(dá)成某事而)不管不顧例 句 ：A growing

16、number of employers are trying to bypass the unions altogether.近義：ignore; neglectare not considered true hibernators, because their body temperature doesnt lower significantly), but a variety of animals take advantage of this evolved adaptation, including the jumping mouse, little brownBears are mos

17、t commonly associated with hibernation (although theybat, eastern chipmunk, woodchuck, and certain species of ground squirrels. At least one bird is known to be a hibernatorthe poorwill, which lives in western North America.主句就是開(kāi)頭的 Bears are most commonly associated with hibernation， 括號(hào)里是進(jìn)一步的補(bǔ)充說(shuō)明，后面

18、的連詞 but 表示轉(zhuǎn)折，接獨(dú)立的句子。It is believed that a compound in the blood of hibernators known as HIT (Hibernation Induction Trigger) lets animals know when its time to prepare for hibernation. Shorter days, diminishing food supplies, and colder temperatures all appear to influence HIT, though the exactmechan

19、ism remains a pound/kmpand/n. 化合物搭配：organic compound有機(jī)化合物compoundn. （做特定用途的）圍地例句：They took refuge in the embassy compound. compoundv. 加??；惡化例句：Additional loss of life will only compound the tragedy.近義：aggravate; exacerbateinduction/ndkn/n. 感 應(yīng)例句：They were inducted into the skills of magic.

20、diminishing/diminii/adj. 逐漸減少的diminishv. 減少，減弱；削弱；貶低相關(guān)：inductv. 使正式就職；正式吸收（某人為成員）；傳授，使了解例句：The worlds resources are rapidly diminishing.Federalism is intended to diminish the power of the central state. He never put her down or diminished her.It is believed that a compound in the blood of hibernator

21、s known as HIT (Hibernation Induction Trigger) lets animals know when its time to prepare for hibernation.這是一個(gè)主語(yǔ)從句，it 做形式主語(yǔ)，that 后面的句子才是真正的主語(yǔ)，從句的主干是 a compound lets animals，賓語(yǔ)補(bǔ)足語(yǔ)是 know when its time to prepare for hibernation。Hibernators tend to eat a lot of extra food in the fall in anticipation of

22、 their winter slumber and build significant stores of white and brown body fat to tide them over. Brown fat provides extra body heat as well as needed energy when the animal wakes up. Some animals also store food in their dens to consume during brief periods of wakefulness.slumber/slmbr/n. 睡 眠tide o

23、ver度過(guò)艱難時(shí)期例句：The money tided him over until he got a job.近義：weather the storm; go throughden/den/n. 巢穴；獸窩近義：nest; kennel; coopdenn. 窩 點(diǎn)例句：He was going through a very difficult time.例 句 ：He thought of that city as a den of iniquity. consume /knsum/ v. 食用；消耗，消費(fèi)用法：be consumed with 充滿(mǎn)（某種強(qiáng)烈的情感） 例句：Carolyn

24、 was consumed with guilt.例 句 ：The electricity industry consumes large amounts of fossil fuels. Hibernation is nothing like a regular nights sleep. In fact, significant physical changes occur within the body during the hibernation period. An animals body temperature plunges, and its respiration and heart rate slow dramatically. The effect can be so extreme that a hibernatinganimal may appe