自吸泵,自引泵(启动时不用灌水)

self priming pump的用法和样例：

例句

A suction pump used to create a partial vacuum.用于使局部真空的抽吸泵。
This article compares the fuelling process between the typical self-suction pump and modern immersible pump-based fuelling in fuelling stations.摘要介绍了传统加油站采用自吸泵型加油机的加油工艺和近年来采用潜油泵加油机的加油工艺，并进行了对比。

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ATTENDANT: Can I help you, sir? SAM: Yes, I've been sitting here for a few minutes. I'm waiting for someone to put gas in my car. ATTENDANT: I'm sorry, sir. But this is the self-service pump. SAM: Self-service? ATTENDANT: Yes. You must fill up the

发表于:2018-11-28 / 阅读(276) / 评论(0)

旅游英语口语

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[00:01.79]test 9 [00:03.35]Section A [00:04.74]Now let's begin with the 8 short conversations. [00:07.90]11. W: Will you take geology next semester? [00:11.31]M: I've had enough science courses. [00:13.75]Q: What does the man mean? [00:30

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王迈迈大学英语六级预测与详解

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发表于:2018-12-04 / 阅读(167) / 评论(0)

英语每日一词

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发表于:2018-12-05 / 阅读(174) / 评论(0)

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发表于:2018-12-13 / 阅读(191) / 评论(0)

高中英语人教版高一

NPR 2010-08-17

Flood survivors blocking a highway in southern Sindh province in Pakistan outrage they're not seeing the humanitarian aid promised them. The BBC's Mike Wooldridge says an estimated 20 million people are affected with waterborne diseases on the rise.

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2010年NPR美国国家公共电台8月

SSS 2009-05-07

Rainforests exist because it rains a lot and that makes forests grow, right? Well, not so fast. What if its not the rain that makes the forests? What if its the forests that actually generate the rain? That is the contention of a paper in BioScience

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Scientific American(五)月

VOA常速英语2008年-Heart Pump Patient No Longer Needs New Heart

By Melinda Smith Washington 28 March 2008 Last month we told you about a young woman in the United States who got an experimental heart pump to help keep her alive. VOA's Melinda Smith has an update on her remarkable story.

发表于:2019-01-12 / 阅读(133) / 评论(0)

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VOA标准英语2010年-Heart Pump Could Save Possibly Million

The World Health Organization says heart disease kills about 17 million people every year and that it will become the leading cause of death in developing countries. But now, there is some hope. A new device is being marketed that could save countles

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VOA标准英语2010年(一月)

VOA标准英语2012--Life-saving Heart Pump Developed for Children

Life-saving Heart Pump Developed for Children Sixteen-year-old Marco Murguia can now play basketball and live a normal life. But in early 2007, when he was ten, his mother, Connie Murguia, noticed he was acting sluggish and took him to Texas Children

发表于:2019-01-13 / 阅读(133) / 评论(0)

VOA标准英语2012年(八月)

VOA标准英语2010-Some Western Workhorses Don't Eat Hay

'Horseheads' dip into the earth to make their owners a few bucks Ted Landphair | Washington, DC 31 March 2010 If you wonder why pumpjacks are sometimes called horseheads, stick a couple of ears and paint an eye on each side of this one, and you'll se

发表于:2019-01-13 / 阅读(180) / 评论(0)

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旅游英语口语情景对话

英文短篇故事（纽约）169 The Bicycle Pump at K-Mart

He was going to ride his bike down to South Ferry. He squeezed the tires. They were soft. They needed air. I should buy a pump one of these days, he thought. He rode his bike to K-Mart on 34th Street. He walked the bike inside the store. He went to t

发表于:2019-01-22 / 阅读(167) / 评论(0)

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单词超市第11期 pump

发表于:2019-02-02 / 阅读(182) / 评论(0)

英语单词荟萃

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The blue bike was sitting in Owens living room. It had no kickstand, so he had wedged the front tire in between two bookshelves so that the bike would stand upright. Both tires were flat. Dust covered the bike. However, no household spiders had set u

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365个英语简短小故事

宇航员为太空行走做准备

CAPE CANAVERAL Two American astronauts will venture outside the International Space Station Monday to stow a failed coolant pump and extend the outpost's Canadian railway. Wearing protective spacesuits in a deadly vacuum(真空) environment, Stephen

发表于:2019-02-05 / 阅读(182) / 评论(0)

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实用英语

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November 10 11月10日 Read it! 读读看！ Taylor needs gas for her car. 泰乐的车子需要加油， She can go to the gas station on June Street. 她可以去六月街的加油站， Can Taylor pay cash there? 泰乐在那里可以付现金吗？

发表于:2019-02-16 / 阅读(100) / 评论(0)

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alloying addition agent

automatic packaging line

baby still