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[VOA常速英语视频] 新视野号的丰功伟绩
Historically, oyster farming used techniques that required raking or vacuuming, damaging eelgrass, which is vital to the survival of tiny fish and other invertebrates.2019-01-21 编辑：Wendy
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[VOA常速英语视频] 美宇航局的测量神器
Trees make up a huge portion of the what scientists call the world's biomass. So we often talk about the biomass of the forest. All that is, is how much do the trees weigh.2019-01-28 编辑：Wendy
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[VOA常速英语视频] 危机重重的委内瑞拉
Thousands of protesters descended on Venezuela's capital Caracas Wednesday to demand an end to Maduro's regime. Some protesters have been reported killed in overnight clashes with the police.2019-01-30 编辑：Wendy
