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英语神人 请帮我看下句子 是关于英语语法的~

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/09 14:19:35
英语神人 请帮我看下句子 是关于英语语法的~
The possibility that mass extinctions may recur periodically has given rise to such hypotheses as that of a companion star with a long-period orbit deflecting other bodies from their normal orbits,making some of them fall to Earth as meteors and causing widespread devastation upon impact.
请问 这里的 as that of a companion star with a long-period orbit deflecting other bodies from their normal orbits,making some of them fall to Earth as meteors and causing widespread devastation upon impact.
是做 hypotheses的定语么?请帮我解释下
还有 这最后面的 upon impact
简化句子如下(稍有改写,方便你理解):
The possibility has given rise to a hypothese of a star making other bodies fall to Earth...
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such hypotheses as that of a companion star...
=> that 指代的就是前面的 hypothesis.你可以改写成 ...has given rise to hypotheses such as a hypothesis of ...
所以,后面那一大截都是hypotheses的定语.
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upon impact 的意思是:“一旦撞击”
upon=on 表示“一旦”的意思.
句意:……有一种假设是:伴星的运行轨道很长,使得其他天体不得不偏移自身的正常轨道,其中一部分被迫变成流星坠向地球,并且在撞击的一瞬间产生大范围的杀伤力.