例句：
很多鸟死于这次严冬。
Many birds didn't survive the severe winter.
这只鸟竖起了羽毛。
The bird ruffled up its feathers.
鸟使牛奶受污染。
The birds infect the milk.
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2021-09-01
例句：
很多鸟死于这次严冬。
Many birds didn't survive the severe winter.
这只鸟竖起了羽毛。
The bird ruffled up its feathers.
鸟使牛奶受污染。
The birds infect the milk.