SSS 2008-11-10

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(47) / 评论(0)

Scientific American(十一)月

每日一词【766】impair：损害、损伤

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(42) / 评论(0)

英语每日一词

学个词Learn a Word 第766期 Impair

发表于:2019-02-06 / 阅读(38) / 评论(0)

英语单词荟萃

Dick and His Cat

Dick and His Cat I Once there was a boy called Dick. He was very poor: his father and mother were dead and he had no friends to help him. One day he heard some men speaking: one man said, I shall go to London, for London is a very big city, and its s

发表于:2019-02-07 / 阅读(136) / 评论(0)

趣味英语

The Old Cat

An old woman had a cat. The cat was very old; she could not run quickly, and she could not bite, because she was so old. One day the old cat saw a mouse; she jumped and caught the mouse. But she could not bite it; so the mouse got out of her mouth an

发表于:2019-02-07 / 阅读(85) / 评论(0)

趣味英语

The Cat and the Bell thecatandthebell

There were many mice in a house. The man of the house got a cat. The cat killed many of the mice. Then the oldest mouse said, All mice must come to my hole tonight, and we will think what we can do about this cat.' All the mice came. Many mice spoke,

发表于:2019-02-07 / 阅读(91) / 评论(0)

趣味英语

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actual discharge capacity

aggressive unilateralism

al Sunna Wal Jamma

alternating force

anchored percussion mine

brush surface discharge