十万个为什么·科学启蒙30篇（2）

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为什么有些动物冬眠，而另一些则迁徙？

Animals choose hibernation or migration based on their body size, food needs, and habitat.
Small mammals like ground squirrels hibernate because they lose heat too quickly to survive cold winters.
Bears enter a lighter form of dormancy called torpor, lowering metabolism without dropping temperature much.
Birds and whales migrate instead because flying or swimming lets them follow food year-round.
Migration requires huge energy reserves and precise navigation using stars, Earth’s magnetic field, or landmarks.
Hibernators rely on stored fat and slow bodily functions to conserve energy for months.
Some frogs freeze solid in winter and thaw alive in spring thanks to natural antifreeze proteins.
Climate change now disrupts both strategies by shifting seasons and altering food availability.
Scientists track these behaviors with satellite tags and tiny sensors on wild animals.
Both adaptations show how evolution shapes survival in extreme environments.

听 → 读 → 学表达 → 懂 → 今天会说这一句 → 跟读录音 → 自己说一句。

Both adaptations show how evolution shapes survival in extreme environments. 这两种适应机制都体现了进化如何塑造极端环境下的生存能力。
Climate change now disrupts both strategies by shifting seasons and altering food availability. 气候变化正通过改变季节和食物供应，干扰这两种生存策略。
Scientists track these behaviors with satellite tags and tiny sensors on wild animals. 科学家用卫星标签和微型传感器追踪野生动物的这些行为。

这篇中文题目最接近哪一句？为什么有些动物冬眠，而另一些则迁徙？一次学校运动会的通知一份超市购物清单

课文第一句的意思更接近？动物根据体型、食物需求和栖息地选择冬眠或迁徙。今天学校放假了。请把窗户打开。

这一课主要在讲什么？（看英文标题） Why Do Some Animals Hibernate While Others Migrate? How to cook noodles A maths worksheet

Both adaptations show how evolution shapes survival in extreme environments.

Both adaptations show how evolution shapes survival in extreme environments.

第一版：录下来、回听、再听标准音。系统打分以后再加。

用今天的表达，自己说一句。

例子：Both adaptations show how evolution shapes survival in extreme environments.