脉动,抗动

impulsive motion的用法和样例：

例句

However, if its membership can be confirmed by proper motion and radial velocity determinations, the cause of light variation may not be pulsation.但是，如果自行或视线速度测定证实为其成员星，那么变光的原因也许不是脉动。

原来这句英语这样说 05_268-300

[00:00.00]268.How would I know? [00:04.00]我怎么知道？ [00:07.99]What happened? [00:09.46]发生什么事了？ [00:10.92]How would I know?I just got back. [00:13.04]我怎么知道？我才刚回来。 [00:15.15]269.None of my business. [00:18

发表于:2018-12-02 / 阅读(134) / 评论(0)

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21世纪大学英语读写教程

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趣味英语

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