老外的英文：
foreigner

The foreigner was eating a hamburger.
那个老外正在吃汉堡包。

There are also foreigners who are willing to come to China to become "Beijing Drifters".
一些老外也想到中国当北漂。

At times, this approach comes across as confusing and unnatural
这样的接触方式有时会让老外犯晕或是觉得不自然。

And don't ply foreigners with lots and lots of disparate questions
不要没完没了地向老外提出大量的互不相关的问题

In the UK, there are the Foreign Office and Foreign Secretary.
在英国，有外交部和外交大臣。

custom of foreign trade.
对外贸易惯例

The guidebook is for the accommodation of foreign tuorists.
这份指南是为了方便外国游客而准备的。

The foreign market was increasingly crucial.
国外市场越来越重要了。

Deception was foreign to his nature.
欺骗和他的本性格格不入。