源头的英文是source。
source的复数形式是sources，第三人称单数形式是sources，过去式形式是sourced，过去分词形式是sourced，现在分词形式是sourcing。相关短语有chronic source慢性污染源，ablation source消融源，artesian source相关信源，可造句子如下：
1、他们的源头隐藏在异国旅行中。
Their origins were shrouded in exotic travels.
2、在一次单独的观察中，她发现手机成为家庭关系紧张的一个源头。
During a separate observation, she saw that phones became a source of tension in the family.
3、即使在童年时期，缺乏关于我自己的信息也是我不快乐的一个源头。
A lack of information concerning my own was a source of unhappiness to me even during childhood.
4、但是辐射作为一个通用术语，实际是指所有从其源头扩散开来的东西。
But radiation as a general term actually refers to anything that spreads away from its source.
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