单词:wood-and-steel composite truss
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Can Wood Be Stronger Than Steel? Researchers say they have created a new super-material in the laboratory. They say it is stronger, lighter and costs less than steel. 研究人员表示,他们在实验室中造出了一种新的超级材料。他们称
00:00.00]Unit 7 Just Imagine! [00:06.37]2.Listen and sing. [00:18.79]Oh,do you know what this might be,What this might be,what this might be? [00:32.22]Oh,do you know what this might be?It's so strange and so big. [00:39.96]Oh,yes,I know what that mi
Lesson 92 A Box Of Matches 第92课 一盒火柴 We need fire every day, to warm our houses, or to cook our food, or to give us light. 我们每天都需要利用火来给房间加温、烹饪、照明。 Even savage tribes use fire for such purposes
This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Airplane manufacturers have been changing over from aluminum to advanced composite materials. These lighter, stronger composites are made of fibers of
托德和詹安娜在讨论学校生活 Todd: Hello! Jeanna: Hello! Todd: Hi, what's your name? Jeanna: Jeanna. Todd: OK, Jeanna, how old are you? Jeanna: I'm 15 years old. Todd: 15! OK, are you in high school? Jeanna: Yes, I am. Todd: OK. What do yo
Todd: Hello! Jeanna: Hello! Todd: Hi, what's your name? Jeanna: Jeanna. Todd: OK, Jeanna, how old are you? Jeanna: I'm 15 years old. Todd: 15! OK, are you in high school? Jeanna: Yes, I am. Todd: OK. What do you think about high school? Jeanna: It's
379 、 石棉 asbestos;asbestus 380 、 石膏 PlasterofParis 381 、 示波器 oscilloscope 382 、 立体图 pictorialdrawing 383 、 交流电流 alternatingcurrent(a.c.) 384 、 交流电压 a.c.
I'm Nancy Beardsley, filling in for Avi Arditti and Rosanne Skirble. This week on Wordmaster we'll talk about bad manners-and how they're reflected in what people are saying and not saying to one another these days. Our guest is British writer Lynne
The two steel truss arch halves of an extra-big bridge over the Lancang River were connected Tuesday morning after two vertical turns. The bridge, which sits 270 meters above the Lancang River, is a part of the DaliRuili Railway in southwest China's
I'm Nancy Beardsley, filling in for Avi Arditti and Rosanne Skirble. This week on Wordmaster we'll talk about bad manners-and how they're reflected in what people are saying and not saying to one another these days. Our guest is British writer Lynne
The world this week 一周要闻 Business 商业 The prospect of an all-out trade war between America and China became real. 美国和中国之间爆发全面贸易战的可能性变成了现实。 Donald Trump said he would impose tariffs on $50bn o
By Barry Wood Washington, D.C. 18 February 2008 The Serbian province of Kosovo, with 90 percent of its population ethnic Albanian, declared independence from Serbia on Sunday. VOA's Barry Wood reports that this latest break with what was once the hea
BEIJING, Aug. 19 (Xinhua) -- China's steel output growth slowed in July and prices of steel products have continued to drop, according to data from the National Development and Reform Commission (NDRC). Crude steel production gained 4.2 percent year
Chinese shares posted their biggest one-day fall in a month yesterday, with indices closing more than 6 per cent lower after a late sell-off. 中国股市昨天出现一个月来最大单日跌幅,在尾盘抛售之后,沪深股指收跌逾6%。
By Nancy-Amelia Collins Sydney 05 September 2007 Foreign and trade ministers from the Asia-Pacific Economic Cooperation members are pushing for ways to revive stalled global trade talks. In a meeting ahead of the annual APEC summit, top trade officia
I'm Nancy Beardsley, filling in for Avi Arditti and Rosanne Skirble. This week on Wordmaster we'll talk about bad manners-and how they're reflected in what people are saying and not saying to one another these days. Our guest is British writer Lynne
Chinese stocks carved out their biggest gain in two months amid speculation that A-shares could be included in MSCIs global benchmarks. 由于市场猜测A股可能会被纳入MSCI明晟的全球基准,中国股市今日出现两个月来最大幅度
The UK government has said that from 2014, it will ban calculators in maths tests for primary school children in England. All 11-year-olds sit three maths tests. Pupils are allowed to use a calculator in the hardest of these. A sample question is: Ti