SSS 2009-01-14

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. When we think about how to represent sound visually, most of us probably picture those volume-dependent sine waves. But thats not how John Stuart Reid

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Scientific American(一)月

VOA标准英语2014--Vehicles May Soon Be Talking to Each Other 汽车或许很快就能相互交流

Vehicles May Soon Be Talking to Each Other 汽车或许很快就能相互交流 WASHINGTON U.S. regulators are close to approving new standards for enabling vehicles to communicate with each other, hoping the new technology will reduce traffic accide

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VOA标准英语2014年(四月)

China strives to reduce air pollutants

BEIJING, Feb. 5 (Xinhua) -- China will make more efforts to reduce PM 2.5 pollutants, as well as other pollutants, a government official said Tuesday. A national obligatory target will be set to limit PM 2.5 emission, which is a fine particulate matt

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英语新闻

U.S. campaign to reduce sugar drink intake

BEIJING, Sep. 1 (Xinhuanet) -- A campaign is being launched across U.S. to help lovers of sugar drinks reduce their habit by the Center for Science in the Public Interest. This campaign is based on the findings of a new survey conducted by CDC (Cente

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英语新闻

加州英语分级G6 Dynamic Earth 01

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发表于:2019-02-19 / 阅读(120) / 评论(0)

加州英语分级G6

加州英语分级G6 Dynamic Earth 06

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加州英语分级G6

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