临界功率比

英闻天下——609 Relief Efforts Continue after "Critical 72 Hours"

The shift is on in Sichuan from rescue to recovery, now that the critical 72-hour window has closed following Saturday's earthquake. CRI's Li Jing has more. Authorities say they managed to rescue around 150 people through the critical 72-hour window

发表于:2018-12-02 / 阅读(53) / 评论(0)

2013年NPR美国国家公共电台1月

英语PK台第99期:英语新闻:特斯拉电动车领域之外再扩张

Tesla unveils batteries to power homes US electric carmaker Tesla Motors has unveiled batteries that can power homes and businesses. Chief executive Elon Musk announced the firm would build batteries that store solar energy and serve as a back-up sys

发表于:2018-12-28 / 阅读(24) / 评论(0)

英语PK台

2007-08-28, Critical Situation: Apollo 13 阿波罗13号

In Houston, Flight director Kranz is trying to make sense of the barrage of information. I am completely surrounded with reports coming in that I dont fully understand, but frankly, problems are our business, and I thought we are going to solve these

发表于:2018-12-30 / 阅读(105) / 评论(0)

国家地理2007年

人到三十：生活教给我宝贵的5堂课

Im 30 years old, and there are several things that life has taught me that I want to share with you. Some of these things Ive known since I was young, some of these things I have learned recently. 我现在30岁了，我想和大家分享一下这些年

发表于:2019-01-08 / 阅读(32) / 评论(0)

励志英语

民权斗争发源地仍然存在经济差距

民权斗争发源地仍然存在经济差距 What about now better jobs, What about better training, and schooling? Kevin Seay is a business owner trying to make it through tough economic times in Selma.He and his wife opened clothing and accessory

发表于:2019-01-14 / 阅读(24) / 评论(0)

VOA标准英语2015年(七月)

China cuts its reserve ratio again

BEIJING, May 13 (Xinhuanet) - China's central bank announced on Saturday it would lower the reserve requirement for commercial lenders by 50 basis points, the second time it has taken such action this year to inject more market liquidity and shore up

发表于:2019-02-04 / 阅读(82) / 评论(0)

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antimonous trisulfide

Armstrong, Neil Alden