当气温低于冰点时，冷血动物的体温也都降低。

When the air temperature is below freezing, its body temperature drops too.

youdao

夜间，气温将降低到冰点一下。

At night, temperatures would drop well below freezing.

youdao

夜间，气温将降低到冰点一下。

At night, temperatures would drop well below freezing.

youdao