单词：nillas
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单词：nillas 相关文章
Wild Songbirds Can Pick Up New Tunes Only a few kinds of animals are known to learn their vocalizations from listening to others. Us, of course. Elephants. Bats. Cetaceanswhales and dolphins. Pinnipedswalruses, seals and sea lions. And parrots, hummi
发表于:2019-02-03 / 阅读(203) / 评论(0)
2018年科学美国人10月
2018年科学美国人10月
Were all familiar with contractions. Plenty are signalled by an apostrophe and others dont hide their origins with any notable ingenuity such as Im, youre, theyll etc. But some everyday words have dispensed with markers of their shortenings, to the e
发表于:2019-02-19 / 阅读(192) / 评论(0)
英文语法词汇
英文语法词汇