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2013-05-23 12:21
求翻译：A survey of 58 butterfly species found that some species had experienced a 71% population swoon since similar surveys were taken in 1970 through 1982. Some 201 bird species were tracked between 1968 and 1971, and then again from 1988 to 1991. An analysis showed that that avian population had declined by about 54%.是什么意思？ 待解决
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A survey of 58 butterfly species found that some species had experienced a 71% population swoon since similar surveys were taken in 1970 through 1982. Some 201 bird species were tracked between 1968 and 1971, and then again from 1988 to 1991. An analysis showed that that avian population had declined by about 54%.
问题补充： |
湖北省互联网违法和不良信息举报平台 | 网上有害信息举报专区 | 电信诈骗举报专区 | 涉历史虚无主义有害信息举报专区 | 涉企侵权举报专区
