单词:composite chromium (electro)plating
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[00:09.95]Six weeks ago, the movie Erin Brockovich opened the United States. [00:16.95]So far, it has earned at least 100,000,000 dollars. [00:22.47]It tells a true story about a young woman who helped people in a California town gain money from an e
[00:01.40]Thank God you didn't. 谢天谢地你没去 [00:02.20]-Oh, my God. -Thank God you didn't. -哦,上帝 -谢天谢地你没去 [00:04.20]Thank God I didn't and you didn't. If one of us had showed up alone... 谢天谢地你没去我也没去
Could an element commonly found in Americans` tap water caused cancer? A nonprofit environmental group is sounding the alarm about something called chromium-6. The U.S. government says high levels of it in the air can be carcinogenic, meaning they ca
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
Help! There's someone hurt! - What are you hearing, Sullivan? - According to first responders it was a bomb. - How many? - Four of yours and five passersby. - Have anyone claimed responsibility? - We found this. - Do you think she's dead? - We can't
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
AS IT IS 2013-05-23 Pollution Forces Residents from California Town Hello. Im Jim Tedder in Washington. Welcome to a special edition of As It Is. Seventeen years ago, an American energy company paid hundreds of millions of dollars to settle legal cla
America is so big. It has 50 states. Some states are bigger than other countries. Texas is the biggest state in America. Texas itself is bigger than France. People sometimes consider states as countries because they are so different. Even cities can
美国航空航天局科学家测试新型飞机 The U.S Aeronautics and Space Administration, NASA, is commonly associated with space exploration, but aeronautics is still a big part of the agencys research. Engineers at its Aeronautics Research Cen
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
JEFFREY BROWN:And now to part two of our investigative look at the safety of America's drinking water. Science correspondent Miles O'Brien reports on the toxic chemical made famous in the movie Erin Brockovich, its potentially harmful effect on human
GWEN IFILL: Now NewsHour science correspondent Miles O'Brien begins a two-part look at America's drinking water, and the regulatory system that is supposed to guarantee its safety. His report is the result of a partnership with the Center for Public
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
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%。
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
Why Stainless Steel Does Not Rust But Other Metals Do? 不锈钢(Stainless Steel)指耐空气、蒸汽、水等弱腐蚀介质和酸、碱、盐等化学浸蚀性介质腐蚀的钢,又称不锈耐酸钢。实际应用中,常将耐弱腐蚀介质