[网络] 龋病活跃性试验；变形链球菌产酸能力测定

New Polio Immunization Drive to Start in Nigeria's Kano Stat

By Nico Colombant World Health Organization officials say the northern Nigerian state of Kano will start a catch-up polio immunization campaign Saturday, ending an 11-month religious-led boycott. The

发表于:2018-12-08 / 阅读(48) / 评论(0)

VOA2004（下）--健康科技

VOA常速英语2008年-Astronauts Opening Space Station Research Lab

By VOA News 12 February 2008 Astronauts from the space shuttle Atlantis are formally opening the new laboratory at the International Space Station Tuesday. Crew members set up electrical and data lines linking the new Columbus laboratory to the stati

发表于:2019-01-08 / 阅读(48) / 评论(0)

VOA常速英语2008年（二月）

VOA标准英语2008年-Astronauts Install Japanese Lab on Space Statio

By Kent Klein Washington 03 June 2008 Astronauts at the International Space Station have attached a $1 billion Japanese laboratory to the orbiting outpost. During a space walk Tuesday, mission specialists Michael Fossum and Ronald Garan unlocked the

发表于:2019-01-11 / 阅读(56) / 评论(0)

VOA标准英语2008年（六月）

Are You Progressing with Progressive Tenses?

Are You Progressing with Progressive Tenses? Editors note: This is the second of a four-part series on verb tenses. Click here to see part one. For VOA Learning English, this is Everyday Grammar. Today we are going to look at the progressive verb ten

发表于:2019-01-12 / 阅读(73) / 评论(0)

2016年VOA慢速英语(一)月

乔布斯传第196期:五月的关键七天(5)

When Eisenstat asked what he meant, Sculley responded, I think I'm going to resign. 艾森斯塔特询问他是什么意思，斯卡利回答说：我想我会辞职。 You can't, Eisenstat protested. Apple will fall apart. 你不能，艾森斯塔特抗

发表于:2019-02-15 / 阅读(46) / 评论(0)

乔布斯传

乔布斯传第195期:五月的关键七天(4)

For Bill Campbell, it was particularly tough. He was fond of Jobs and didn't particularly like Sculley. 对于比尔坎贝尔来说，这个抉择尤为艰难。他很欣赏乔布斯，但并不是特别欣赏斯卡利。 His voice quavered a bit as

发表于:2019-02-15 / 阅读(38) / 评论(0)

乔布斯传

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