外头的英文：
outside
out

参考例句：

Gosh, it's hot out today!
哟，今天外头这么热!

She didn't put on an overcoat though it was very cold outside.
外头虽冷，她却没披件外套。

It's over 100 degrees out there.He grabs me with ice-cold hands
外头温度超过华氏100度他却用冰冷的双手抓住我

Don't bother to get dinner for me today; I'll eat out.
今天不要麻烦为我预备饭了，我要在外头吃。

out是什么意思：
adv. 出外；在外；离岸；出现；问世；大声地；完全；用完；不流行
adj. 外侧的；偏僻的
prep. 通过…而出；沿着…而去
n. 借口，托辞
pref. 外，超过，出，向外

be out for the count
拳击者被击倒后经裁判数到十秒还站不起来|被判失败|打输|被打败

Out of the Blue
从天上掉下来

Out of power, he is out of favour.
当他失去权力之后，他也就不再受人欢迎。

One that is out, especially one who is out of power.
在野者在外的人，尤指政治上的在野派。

"Out of office, out of danger"
无官一身轻