分单元介绍了对引进煤气净化技术的认识、 消化及改进情况，总结了几年来对工艺技术的理解和实践经验。

The study, digest and improvement of imported gas purifying technique are introduced, the understanding of technology and technique and practical experience in recent years are concluded.

youdao

在第一单元，我们学习了如何介绍某人自己。

In the unit one, we learned how to introduce oneself.

youdao

例如，有一个展出单元被介绍作布勒松对“美国的粗鄙、贪婪和种族主义”的批判。

One section, for instance, is introduced as Cartier-Bresson's criticism of "American vulgarity, greed and racism".

youdao