冷天的英文：
cold day

参考例句：

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。

cold是什么意思：
adj. 寒冷的；冷淡的；失去知觉的
n. 寒冷；感冒
adv. 完全地

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。

day是什么意思：
n. 一天；白昼，白天；工作日；时代，时期

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。