Barry's day soon takes a nasty turn.

巴里的生活很快就会发生糟糕的转变。

The weather turned nasty towards the evening.

【nasty，nastily，nastiness】傍晚时分天气变坏了。

When Harry refused, Don turned nasty and went for him with both fists.

【nasty，nastily，nastiness】哈里拒绝后，唐翻了脸，挥动双拳向哈里扑去。

Well, at the moment, these flying squirrels are in the woods trying to find as much food as possible before the weather turns nasty and the winter kicks in.

此刻，这些飞鼠正努力在天气变冷、冬季降临前，尽可能地在树林里多找些食物。