Diffusion impurity source

diffusion [dɪ'fjʊʒən]

n. 扩散;<物，化>扩散;传播;<人>（文化等的）传流;

dif分开+fus流，泻+ion名词后缀→ 普及；弥漫

impurity [ɪm'pjʊrəti]

n. 污点，污染;掺杂，不纯;不道德，罪恶;混杂物，粗劣品;

im不+pur纯洁+ity名词后缀 → 不纯；有罪

source [sɔrs]

n. 根源，本源;源头，水源;原因;提供消息的人; vt. （从…）获得;发起;向…提供消息;寻求（尤指供货）的来源; vi. 原料来源;起源;寻求来源;寻求生产商（或提供商）;

source(rise)→泉源；源头

He took French leave.

他不辞而别。

Rose, let me introduce my friend to you.

罗斯，让我介绍一下我的朋友。

We can perhaps forgive those who said the moons of Jupiter were produced by Galileo's spyglass if we recall that in his day, as for centuries before, curved glass was the popular contrivance for producing not truth but illusion, untruth;

如果我们回想一下伽利略之前几个世纪期间，曲面镜一直是一种用于产生幻影而不是产生真象的把戏装置，那么我们就会原谅那些当时把伽利略观察到的木星卫生说成是伽利略用他的小望远镜变出来的人们，