蒸汽膨胀

useless 无用的,没有价值的 user 用户,使用者 usual 通常的,平常的 usually 通常 utility 效用,实用 utilise 实用 utilize 利用 utmost 极度的,极端的,极限 utter 完全的,彻底的说 vacant 空闲的,空缺的

发表于:2018-12-01 / 阅读(136) / 评论(0) 分类 大学英语四级词汇拼读版

[00:00.00]UNIT 7 Expansion 7 [00:07.69]2 My name is Lily. [00:11.08]I'm thirteen yeard old . [00:13.40]I live in Beijing with my family. [00:16.35]Every day I go to school [00:18.37]just like other teenagers. [00:20.43]I always get up at seven o'cloc

发表于:2018-12-04 / 阅读(247) / 评论(0) 分类 北师大版初中英语七年级下

The Little Boy Lost 小男孩的迷路 'Father, father, where are you going? 父亲、父亲,你往哪儿去? O do not walk so fast! 啊,别走得这么快呀。 Speak, father, speak to your little boy, 说话呀,父亲,跟你孩子说话呀

发表于:2018-12-06 / 阅读(204) / 评论(0) 分类 天真与经验之歌

Every day the sun's rays change thousands of tons of liquid water into water-vapour; 每天, 太阳光都能够将数千吨的液态水转化为水蒸气; and this water-vapour mingles with the air, and is carried along by the wind. 随后, 水蒸气

发表于:2018-12-18 / 阅读(81) / 评论(0) 分类 英国学生科学读本

When we change a liquid into vapour, and cool this vapour till it is liquid again, 将水加热成水蒸气, 然后对其进行冷却直至再次液化, we are said to distil the liquid, and the apparatus for doing this is called a still. 这个过程就

发表于:2018-12-18 / 阅读(84) / 评论(0) 分类 英国学生科学读本

Thus by heating liquids we cause them to evaporate, or change into vapours or gases; 因此, 可以看出:我们能够通过加热液体使得它们蒸发, 变成水蒸气或气体; and by taking away heat from these gases, or cooling them, we tu

发表于:2018-12-18 / 阅读(97) / 评论(0) 分类 英国学生科学读本

Lesson 88 Condensation 第88课 冷凝 When the water in a kettle boils, it boils first at the bottom. 当水壶中的水沸腾时, 首先开始沸腾的是底部的水。 We cannot see this in a kettle, because the kettle is made of iron. 我们无法

发表于:2018-12-18 / 阅读(119) / 评论(0) 分类 英国学生科学读本

[00:00.00]UNIT 12 Expansion 12 [00:07.10]2 Hi,James, [00:09.92]Thanks for you letter. [00:11.35]You asked about my home. [00:13.58]I live with my parents in an apartment [00:14.97]in a district in the east of Beijing. [00:19.02]I live quite near Beij

发表于:2018-12-29 / 阅读(178) / 评论(0) 分类 北师大版初中英语七年级下

[00:00.00]UNIT 11 Expansion 11 [00:09.20]1 One day in England Diego [00:12.71]and Fernanda were very hungry. [00:15.40]They didn't have any food [00:17.34]and they didn't have any money. [00:19.65]So they thought out a clever plan [00:21.78]to get a

发表于:2018-12-29 / 阅读(206) / 评论(0) 分类 北师大版初中英语七年级下

[00:00.00]UNIT 10 Expansion 10 [00:08.19]6 Were there any programs on TV last night? [00:13.05]I was out. [00:14.46]No,there weren't. [00:16.34]There was a comedy,but it wasn't funny. [00:19.53]And there weren't any good soaps. [00:21.93]My Family wa

发表于:2018-12-29 / 阅读(186) / 评论(0) 分类 北师大版初中英语七年级下

IN THE NEWS - European Union Expansion By Cynthia Kirk BROADCAST: December 21, 2002 This is Steve Ember with the VOA Special English program, IN THE NEWS. The European Union has officially asked ten c

发表于:2019-01-02 / 阅读(93) / 评论(0) 分类 教育与新闻

The small Ethiopian town of Dukem has some of the most fertile land in the country. It also is home to Ethiopias first industrial park. Dukem is part of a government-led push to turn the mostly agricultural country into Africas manufacturing center.

发表于:2019-01-03 / 阅读(157) / 评论(0) 分类 2018年VOA慢速英语(二)月

I'll take what you got got got I know it's not a lot lot lot Cause I just need another hit You're the thing that I can't quit You got what I want want want Here and then you're gone gone gone If you told me that we were through You know that I would

发表于:2019-01-10 / 阅读(112) / 评论(0) 分类 英文摇滚歌曲

Lesson 70 Evaporation 第70课 蒸发作用 Let us fill a small kettle with water, and place it on the fire. The water will soon begin to boil. After an hour or so we shall find the kettle quite empty, although no one has touched it since it was plac

发表于:2019-01-17 / 阅读(105) / 评论(0) 分类 英国学生科学读本

The finger which is wet with alcohol will be dry before you can count ten, while the finger which is wet with water may take a minute or more to dry. 在你数到十之前, 那根沾有酒精的手指就会变得干燥, 而另外一根沾有水的手指

发表于:2019-01-17 / 阅读(97) / 评论(0) 分类 英国学生科学读本

As 2014 draws to a close, its time to look back and see which words have been significant throughout the past twelve months, and to announce the Oxford Dictionaries Word of the Year. Without further ado, we can exclusively reveal that the Oxford Dict

发表于:2019-02-04 / 阅读(104) / 评论(0) 分类 英语新闻

The Worrler of Qi A man of the state of Qi was afraid that the sky would fall down and the earth would cave in.The thought that he would not be able to find shelter when that happened worried him so much that he had no appetite for food and slept v

发表于:2019-02-07 / 阅读(163) / 评论(0) 分类 趣味英语

Lesson 35 Getting up Steam 第35课 蒸汽往上冒! Do you want to know what steam is? Let us get a lump of ice, or a snow-ball, and place it in a saucer in a warm room. It soon melts, and then the saucer is half full of water. If we leave the sau

发表于:2019-02-07 / 阅读(105) / 评论(0) 分类 英国学生科学读本

BEIJING, March 6 (Xinhua) -- Beijing Mayor Wang Anshun on Wednesday said the capital will work hard to cool down rapid urban expansion in order to address traffic congestion, pollution and resource scarcity. We will make efforts to control Beijing's

发表于:2019-02-08 / 阅读(118) / 评论(0) 分类 英语新闻

今天我们要学的词是expansion。Expansion 扩展,扩充。The Kennedy Arts Center unveiled a $100 million expansion plan. 肯尼迪艺术中心宣布扩展计划,耗资一亿美元。President Obama supported the expansion of H1B visas fro

发表于:2019-02-18 / 阅读(118) / 评论(0) 分类 英语单词荟萃
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