题目
英语翻译
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．
提问时间：2020-06-19
答案
时间状语: Early in the century, 主语:a pump + 谓语:had come into use 从in which .句末: 定语从句修饰use in which =in use 在使用中 定从中含有一个并列句: 分句1: expanding steam(主语)+ raised a piston ...
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