外援的英文：
foreign aid
outsourcing

参考例句：

We attempted the difficult maneuver without assistance.
我们尝试在没有外援的情况下完成复杂的特技动作

foreign是什么意思：
adj. 外国的；不属于本身的；无关的；外交的；陌生的

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。

aid是什么意思：
n. 援助；帮助；助手；辅助设备
v. 帮助，援助

This is an Aids charity.
这是一个艾滋病慈善组织。

He carries the AIDs virus (is infected with the AIDs virus)
他携带爱滋病病毒

To machine(an object)with the aid of a jig.
用夹具辅助加工（一物件）

outsourcing是什么意思：
n. 外包；外购
v. [outsource] 的现在分词形式；外包

Outsourcing doesn't really solve the problem.
把业务承包给其他公司不会从根本上解决问题。

Companies were early into outsourcing and offshoring, too.
英国公司也很早就开始采用境内和离岸外包。

Increasingly, corporate clients are seeking to outsource the management of their facilities.
越来越多的公司客户寻求将设施的管理外包出去。