冷天的英文：
cold day

The engine performs well in cold weather.
这种发动机在冷天性能很好。

You should put a robe on if you go out in a cold day
冷天出门时要披上披肩。

A persons lips or skin often chap in cold weather
人的嘴唇和皮肤在冷天常会裂开。

I hate queuing up in the cold to get into the cinema.
我讨厌在大冷天排队等候进电影院看电影。

Take back these thoughts which here unfold too, ;And which on warm and cold days I withdrew From my heart's ground.
也请收下了我的回敬;;那在热天，在冷天，发自我心田的情思的花朵。

Colds are catching.
感冒是有传染性的。

a cold unfriendly nod; a cold and unaffectionate person; a cold impersonal manner; cold logic; the concert left me cold.
冷淡、不友好的打瞌睡；冷漠、没有感情的人；冷漠的客观态度；冷静的逻辑推理；音乐会让我扫兴。

You catch a cold in summer when the air is not cold.
在夏天，天气不冷时，你也会感冒。

The cold weather froze the lake.
寒冷的天气把湖冻住了。

Winter is a time of cough and cold.
冬季是易患咳嗽和感冒的季节。

Things go on day by day.
事情逐日进行着。

Day by day the situation is improving.
情况在一天天地好转。

Like this, day after day.
就这样，日复一日。

It was a fateful day.
那是个不祥的日子。

Meantime, from day to day they endure.
同时，一天天他们捱了下去。