单词：internal weld protrusion
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用mp3背四级单词
1.Computer-Aided Manufacturing(CAM) 计算机辅助制造 A: Is CAM used in China? B: Yes，it has been uesd in China for almost twenty years. A：在中国有使用CAM的吗？ B：有啊，在中国使用已经将近20年了。 2.Hot working 热加工 A: What are the hot working proc
天天商务口语
The surface of this long sheet-iron cigar no longer offered a single protrusion that could hamper its maneuvers. 在这根长长的钢铁雪茄表面，连一处妨碍它行动的细小突出部分也没有。 I returned to the lounge. 我回到了客厅
《海底两万里》中英双语有声读物
Private Universities in the United States美国私立大学 Universities in the United States fall into five major categories: private universities, public universities, church universities, public community colleges, and private vocational colleges.
走进哈佛大学
异构是相对于同构而言的。异构词是指在拼写上只相差一两字母的两个或几个单词，若异构词里有一个是我们所熟悉的，就可以拿来记忆其他不熟悉的异构词（GRE单词）。异构法最适合记忆中
雅思英语
It is moreover declared in his pyramidical silence. 而且是表现在它那种莫测高深的缄默上。 And this reminds me that had the great Sperm Whale been known to the young Orient World, he would have been deified by their child-magian thoug
白鲸记