This is Scientific American's 60-Second Science. I'm Karen Hopkin. This will just take a minute. Every year, scores of manatees are killed by boats in Floridas waters. Their plight is an ecological concern. And everyone from marine biologists to Marg

发表于:2019-01-08 / 阅读(95) / 评论(0) 分类 Scientific American(十一)月

今天我们要学的词是impair。 Impair是损害、损伤的意思。一项最新研究建议美国军方全面禁止吸烟。According to the study, tobacco use impairs military readiness in the short term, 研究显示,吸食烟草短期内有损

发表于:2019-02-03 / 阅读(79) / 评论(0) 分类 英语每日一词

今天我们要学的词是impair。 Impair是损害、损伤的意思。一项最新研究建议美国军方全面禁止吸烟。According to the study, tobacco use impairs military readiness in the short term, 研究显示,吸食烟草短期内有损

发表于:2019-02-06 / 阅读(68) / 评论(0) 分类 英语单词荟萃