承冷却水升压泵

Horizon - Life On Mars 火星生命 - 3

Conditions on Mars were so harsh that it was hard to imagine any life surviving there. The idea of sophisticated aliens was wiped out. We know that conditions on Mars today are not very good for life.

发表于:2018-12-07 / 阅读(94) / 评论(0)

火星生命

剑桥雅思报考指南第17期:OG04 Recording 19

听力文本 Recording 19 录音19 A. At the bottom of the system, there is a storage tank, which can hold up to 500 litres of rainwater. The water stored in the tank can be used for general gardening and cleaning. A、在该系统底部有个贮存水

发表于:2018-12-18 / 阅读(107) / 评论(0)

走进剑桥大学

英语听力：自然百科旱灾的成因与影响

旱灾的成因与影响 Its signs are subtle and slow: the earth dries; water levels fall; the rains do not come; and the land is gripped by drought. At its most basic, a drought occurs when more water is used than isreplenished. It is a balance bet

发表于:2018-12-26 / 阅读(114) / 评论(0)

自然百科2016年

2008年ESL之日常生活 05 Using the Restroom

05Using the Restroom GLOSSARY restroom a public bathroom; a large room with one or more toilets and sinks* Do you know where the mens restroom is? mess disordered; unclean; not organized or neat* Your room is a mess! Please clean it up before your gr

发表于:2018-12-26 / 阅读(107) / 评论(0)

2008年ESL之日常生活

英语听力：探索发现科学新发现：我们的大气层-18

The air thins and they begin to lose the protective weight of the miles of air above them. The pressure is dropping, when you finally get to the stratosphere, and to the altitude we like to work at, it's only one one hundredth that of it's on the gro

发表于:2018-12-27 / 阅读(82) / 评论(0)

探索与发现2014年

新西兰英语 685 Child booster seats in cars

New Zealand will change the law to make it compulsory for children up to the age of 7 to sit in a booster seat in a car. At the moment, the law says it is compulsory for children up to the age of 5. Doctors at Starship hospital, which is the Auckland

发表于:2018-12-31 / 阅读(86) / 评论(0)

新西兰英语

儿童英语读物 The Firehouse Mystery CHAPTER 2 Just Like Real Firefighters

Steve, are you a firefighter, too? Violet asked as they followed him. Yes, he said, wheeling himself through a side door. I used to be on active duty, until I was injured in an accident. Since then I havent been able to walk. So now I work in the off

发表于:2018-12-31 / 阅读(129) / 评论(0)

56 The Firehouse Mystery

60秒科学:Do Rainforests Create Rain?

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

发表于:2019-01-02 / 阅读(151) / 评论(0)

60秒科学

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

发表于:2019-01-08 / 阅读(107) / 评论(0)

Scientific American(五)月

英文短文：Cohesion-tension Theory

Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the ninete

发表于:2019-01-08 / 阅读(81) / 评论(0)

英语小短文

美联社新闻一分钟 AP 2014-03-05

1.Another round of snow in the winter that just won't quit. A storm bearing down on areas from Oklahoma to New York, expected to dump ice and up to a foot of snow in some places. 2.Ukrainian troops trapped in their own country. On Sunday, forces were

发表于:2019-01-11 / 阅读(147) / 评论(0)

美联社新闻一分钟2014(三)月

VOA标准英语2011--Fukushima Plant Operator: Nitrogen Pumpi

Fukushima Plant Operator: Nitrogen Pumping Operation Going Well A plan to inject nitrogen into the containment vessel around reactor 1 at the Fukushima Daiichi power plant appears to be working, the plant owner said Thursday. Higher pressure levels h

发表于:2019-01-14 / 阅读(98) / 评论(0)

VOA标准英语2011年(四月)

VOA标准英语2008年-Engineer, Inventor, Capitalist Martin Fisher, S

Engineer and inventor Martin Fisher has applied his passion for improving things to the challenge of eliminating poverty in rural Africa. As Maura Farrelly reports, his non-profit organization is transforming the lives of thousands of poor African f

发表于:2019-01-20 / 阅读(77) / 评论(0)

VOA标准英语2008年（九月）

英语访谈对话 515 Life in Africa

Todd: So Carla, you lived in Africa. Carla: We got married in Africa. Todd: Wow. Carla: And we moved to Nigeria. As I told you before, we got married in Ghana, and we moved to Nigeria. And our kids were born in Nigeria. But I wanna tell you a little

发表于:2019-01-30 / 阅读(150) / 评论(0)

英语访谈对话

英国学生科学读本第35期:蒸汽往上冒(2)

There would soon be an explosion; the kettle would be burst open. It is in this way that boiler explosions are often caused. When there is too much steam in a boiler, and it cannot get out, it presses against the sides of the boiler, until at last th

发表于:2019-02-07 / 阅读(152) / 评论(0)

英国学生科学读本

科学喝水要知道的4件事

【英文原文】 If I were to stop drinking water right now, how long could I live? There are several different factors involved here. A human being isnt an automobile which needs a certain amount of gas. There are conditions under which a person c

发表于:2019-02-16 / 阅读(75) / 评论(0)

英语听力广播—Listening

机械专业英语词汇

后角 clearance angle 龙门刨削 planing 主轴 spindle 主轴箱 headstock 卡盘 chuck 加工中心 machining center 车刀 lathe tool 车床 lathe 钻削镗削 bore 车削 turning 磨床 grinder 基准 benchmark 钳工 locksmith 锻 forge 压模

发表于:2019-02-18 / 阅读(137) / 评论(0)

实用英语

原版英语对话1000个:516 Life in Africa

发表于:2019-02-18 / 阅读(81) / 评论(0)

原版英语对话1000个

听播客学英语 107 如何保持温暖

If you visit upland areas of Britain places like the mountains of Scotland, or Wales, or the Pennine Hills in northern England you will see a lot of sheep. Many of the sheep are in places where there are no walls or hedges to keep them in their field

发表于:2019-02-19 / 阅读(111) / 评论(0)

听播客学英语

英语俚语天天说第379期:"No pressure"可不是"没压力"

【俚语】 Nopressure. Sonopressurethen! Nopressureoranything! [讽刺的语气] 这下压力来了【例句】 Boss:Thisemployeereviewwillhaveahugebearingonwhetherornotyou'rekeptonattheendoftheyear. 这次员工考核，对于年终你是否可以留

发表于:2019-02-21 / 阅读(118) / 评论(0)

英语俚语天天说

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22-Stigmastenol

a.g.m.

accidental involution