单词:free-fall coring tube with piston
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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
by Michael W. Flynn First, a disclaimer: Although I am an attorney, the legal information in this podcast is not intended to be a substitute for seeking personalized legal advice from an attorney licensed to practice in your jurisdiction. Further, I
Yvonne: This is 6 Minute English, I'm Yvonne Archer and Alice has kindly joined me for today's programme. Hello Alice. Alice: Hi Yvonne. Yvonne: Now Alice, how do you get around London? Alice: Ooh by bus, bicycle and usually the Tube. Yvonne: Aha, an
BBC Learning English London Life Friendliness on the tube Yvonne:I'm Yvonne Archer and this is London Life from bbclearningenglish.com. Hello! In today's programme, we're talking about friendliness on London's tubes. Is there any? As you probably kn
A group of senior students from Zhejiang University have successfully developed an air hand-washing device. 浙江大学的一队大四学生成功研制出了空气洗手装置。 The device utilizes an infrared ray induction system, which detects t