代用材料

Another Danger of Hormone Replacement Therapy

Broadcast: June 11, 2003 By Nancy Steinbach This is the VOA Special English Health Report. New research has found another danger of hormone replacement therapy1. The therapy studied involved the hormo

发表于:2018-12-07 / 阅读(67) / 评论(0)

VOA2003（上）-国际经纬

VOA标准英语2010年-Regrowing Worn Joints Using Patient St

Various stages of cartilage growth on scaffold. The final image on the right shows naturally forming cartilage for comparison. These replacement joints can be made of combinations of metal alloys, plastic and ceramic, but new research shows that it m

发表于:2019-01-13 / 阅读(59) / 评论(0)

VOA标准英语2010年(八)月

VOA标准英语2014--Graphene Called Amazing, Versatile Material of the Future 前景光明的多功能材料石墨烯

Graphene Called Amazing, Versatile Material of the Future 前景光明的多功能材料石墨烯 In 2004, two scientists at the University of Manchester in England isolated a carbon-based material called graphene, with some unusual properties. Andre

发表于:2019-01-14 / 阅读(63) / 评论(0)

VOA标准英语2014年(二月)

VOA标准英语2014--Scientists Create Blackest Material Ever

Scientists Create Blackest Material Ever Of all the black things in the universe only the infamous black holes are so black that not even a tiny amount of light can bounce back. But scientists have managed to create material almost as black, and it h

发表于:2019-01-14 / 阅读(58) / 评论(0)

VOA标准英语2014年(七月)

每日一词【912】replacement：替代，替补

今天我们要学的词是replacement。 Replacement, 意思是替代，替补。The coach chose Jimmy as the replacement for the injured quarterback, 教练选择Jimmy代替受伤的四分位。The basketball player just had a knee replacement surg

发表于:2019-02-06 / 阅读(40) / 评论(0)

英语每日一词

学个词Learn a Word 第912期 replacement

发表于:2019-02-06 / 阅读(39) / 评论(0)

英语单词荟萃

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学英语单词

above-stairs

accurate rapid dense method

adipositas cardia

adsorption precipitant

automatic drafting machine

automatic poultry feeder