单词：tangential grinding force
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757 、 玻璃纤维席 glassfibremats 758 、 界面；分界面；接口 interface 759 、 相差 phasedifference 760 、 相对密度 relativedensity 761 、 砂布 emerycloth 762 、 砂磨 sandin
英文名句短语
This is Scientific Americans 60-Second Science, Im Cynthia Graber. This will just take a minute. Not too long ago, scientists had to hoof it to the library to review the literature. And they had to flip through a card catalog to find that dusty old v
Scientific American(七)月
41.Supposition 猜测 1.They'll be taking some exercise. 2.This house must be at least 1oo years old. 3.The bus must have gone . 4.He can't have remembered. 5.You must be joking. 6.Maybe he has too much money. 7.I guess he'll fail the exam. 8.They're
英语口语每天说
Dialog 1 Where is a good place to eat around here? What kind of food are you hungry for? I'm in the mood for piza. There is a piza place on the corner of avenue quay, it's pretty good. Is it expensive? No, the prices are pretty reasonable. Dialog 2
英语会话速成
[00:00.00]601.It's all over,why torture yourself. [00:02.19]一切都已过去，为什么还要折磨自己。 [00:04.39]602.Words move fast. [00:05.51]人言可畏。 [00:06.64]603.He is he,I am me. [00:08.22]他就是他，我就是我。 [00:09.8
美国常用口俚语
In the front of its lower jaw there are eight sharp teeth for nipping. There are no teeth in its upper jaw opposite these, but there is a hard pad instead. At the back of its mouth the sheep has six teeth with flat tops on each side of each jaw. Thes
英国学生科学读本