单词：internal upset drill pipe
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block and tackle 滑轮组 boring 钻孔 circulate 注入，环流 coring bit 取芯钻头 cutting bit 钻头 cylinder 圆柱体 derrick 井架 drill pipe 钻杆 every so often 时常 geologist 地质学家 gusher 喷油井 mineral 矿物的 rotate 使
新概念英语第四册单词MP3
unit 131 打破物品致歉 dialogue 英语情景对话 A:I feel terrible, but I've just broken your ashtray. A:很对不起，我刚把你的烟灰缸打破了。 B:It's nothing to get upset about. B:不用为此担心。 A:I don't know what to say.
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Alice: Hello, I'm Alice Stephen: And I'm Stephen.Alice: And this is 6 Minute English! This week were talking about a very commonphobia a fear of the dentist and a possible new treatment. But first of all,Stephen, how does this sound make you feel? In
六分钟英语
今天我们要学的词是upset。 Upset, 作为名词，有击败的意思，通常是指击败本来以为必胜无疑的一方。在新罕布什尔州的美国总统党内初选中，纽约州联邦参议员希拉里.克林顿出人意外地击败了
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TEHRAN, July 4 (Xinhua) -- The Iranian Islamic Revolution Guards Corps (IRGC) concluded the three-day missile drill on Wednesday with Iranian military officials warning against any military aggression on the country. On the third and last day of the
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BEIJING, Feb. 24 (Xinhua) -- Police in Beijing municipality have performed an emergency response drill in their preparations for the country's annual legislative and political advisory sessions, a police officer said Friday. The drill was organized t
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