英语词汇mass extinctions怎么读，是什么意思，单词翻译、读音、固定搭配用法和短语词组及例句-英汉双解词典

单词	mass extinctions
释义	mass extinctions 简明释义生物灭绝网络释义 1 ?大灭绝化石记录显示有好几个大灭绝（Mass extinctions），例如在二叠纪中的大灭绝发生于约二亿年前，约有96﹪的物种被绝灭。 2 ?大毁灭 ... Volcanic Eruptions 火山迸发 Mass Extinctions 大毁灭 Is Pluto a Planet？冥王星是行星吗？ ... 短语 1 Mother of all mass extinctions 大规模灭绝之母 2 Sixth mass extinctions 第六次物种大灭绝 3 THE BIOSPHERE AND MASS EXTINCTIONS 生物圈和种群灭绝双语例句 1 The rates of extinction happening today are as great as the rates during these mass extinctions. 现今物种灭绝发生的速度和这些大规模灭绝的速度一样快。 2 Cases in which many species become extinct within a geologically short interval of time are called mass extinctions. 许多物种在地质上很短的时间间隔内灭绝的情况称为大灭绝。 3 The Permian event has attracted much less attention than other mass extinctions because mostly unfamiliar species perished at that time. 二叠纪大灭绝事件比其他大灭绝事件受到的关注要少得多，因为那时灭绝的大多是我们不熟悉的物种。
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