Diffusion (vacuum)pump
[化] 扩散泵; 扩散真空泵
🧩 词语组成解析
🗣️ 情景例句
Sometimes, by buying something cheap now, you will be costing yourself more in the long run.
有时候你花了很少钱买了便宜货，但它日后可能要花掉更多的钱。
To build with blocks
搭积木
The workmen told him to do as he pleased and the policeman telephoned for help.
工人说，悉听尊便。警察去打电话叫人。