a thing, place, activity etc that you get something from

来源，出处:

They get their money from various sources.

他们用各种办法弄到钱。

a useful source of information

很有用的消息来源

Beans are a very good source of protein.

豆类是非常好的蛋白质来源。

For me, music is a great source of enjoyment.

对我来说，音乐是快乐的重要源泉。

the country's main source of income

该国主要的收入来源

relatively clean energy sources

相对清洁的能源

Is your pension taxed at source (=before it is paid to you)?

你领的是税后养老金吗？

the cause of something, especially a problem, or the place where it starts

〔问题等的〕原因，根源，起源:

We've found the source of the trouble.

我们已找出故障的原因。

The recent name change has been the source of some confusion.

最近的更名造成了一些混乱。

a person, book, or document that supplies you with information

提供消息者; 资料来源:

List all your sources at the end of your essay.

在论文末尾列出你所有资料的来源。

I've heard from reliable sources that the company is in trouble.

我从可靠的消息来源获知，那家公司遇上了麻烦。

the place where a stream or river starts

〔溪流的〕发源地，水源

[technical] source code

源（代）码

if goods are sourced from a particular place, they are obtained from that place

从…获得; 来自…:

Fish for the restaurant is sourced daily from British ports.

这家餐馆的鱼是每天从英国的港口运来的。

locally sourced milk

产自本地的牛奶

to find out where something can be obtained

找出…的来源; 找…的货源:

We might be able to source the parts.

也许我们能找出哪里可以买到这些零部件。