英語翻譯
英語翻譯
Early in the century,a pump had
come into use in which expanding steam raised a piston in a cylinder,and
atmospheric pressure brought it down again when the steam condensed inside the
cylinder to form a vacuum．
Early in the century,a pump had
come into use in which expanding steam raised a piston in a cylinder,and
atmospheric pressure brought it down again when the steam condensed inside the
cylinder to form a vacuum．
英語人氣：815 ℃時間：2020-04-06 13:59:28
優(yōu)質(zhì)解答
時間狀語: Early in the century,主語:a pump + 謂語:had come into use從in which .句末: 定語從句修飾usein which =in use 在使用中 定從中含有一個并列句: 分句1: expanding steam(主語)+ raised a piston ...
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