日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

您現在的位置: > En_language tips > 輕松英語 Easy English > 一問到底 Odd Question Dec 26, 2005
 





  Why do some animals hibernate in the winter?

   
  Hibernation
   
  Why do some animals hibernate in the winter?

Black bears, hummingbirds and squirrels hibernate in the winter because a long, chilly season of little food and warmth is no picnic for these animals.

Unlike the warm seasons of spring and summer that provide an unlimited amount of food for these critters, the winter season only provides a cold, frozen ground where food is extremely scarce.

In addition, the wintery days are frigid and short while the hours in the dark night seem to drag on for a chilly eternity. Searching for grub often leaves the stomachs of these animals empty because by the end of their search their bodies end up burning more calories than the animals get back from the food when and if any is found. So instead of starving or freezing to death, these animals decide to pack in all in for the long haul and hibernate during the winter months.

Hibernation helps these animals survive in the roughest and toughest conditions. By hibernating, an animal decreases its body‘s energy needs to a bare minimum. Hibernation is a process of lowering an animals body temperature and slowing down its heartbeat into order to conserve energy during times of scarcity and stress.

Every animal hibernates in different ways. While squirrels can wake up every four days to grab a bite to eat and take a trip to the bathroom, black bears can stay dormant, or inactive, for up to seven months with no food, water, or visits to the bathroom.

 

note:

black bear: 黑熊
hummingbird: 蜂鳥

 


critter: 生物

 

grub: 食物

 

 

 

 

conserve: 儲存

 
 
 
主站蜘蛛池模板: 色播视频在线播放 | 国产精品视频在线观看 | 天天操天天爱天天干 | 毛片成人永久免费视频 | 奇米影视777中文久久爱 | 欧美zzzz | 视频一区国产 | 亚洲高清久久 | 谍影特工在线观看完整版 | 九九热精品视频在线播放 | 美女扒开胸罩给男生看视频 | 小泽玛利亚一区二区 | 日韩一区二区三区视频 | 成人欧美s视频在线观看 | 久爱www成人网免费视频 | 欧美视频网站免费看 | 草草线在成人免费视频 | 免费黄色大片在线观看 | 欧美成人性视频播放 | 久久综合玖玖爱中文字幕 | 99热久久66是国产免费 | 黄视频欧美| 国产自啪啪 | 综合国产 | 在线观看亚洲一区二区三区 | 91久久精品国产一区二区 | 久久久国产一区二区三区 | 国产一三区A片在线播放 | 人人草在线 | av影片在线 | 男女又黄又刺激B片免费网站 | 最近免费日本视频在线 | 成人精品视频在线观看 | 亚洲一区二区三区四区五区中文 | 99久久精品国产导航 | 国产精品91在线播放 | 人人看人人干 | 人人亚洲 | 污免费网站 | 日日摸夜夜添夜夜 | 精品国产午夜福利在线观看 |