Pems
abbr. pico-electromechanical system 皮[微微]米电子机械系统; Portable Environmental Measuring System 便携式环境测量系统
🗣️ 情景例句
You can't expect to learn a foreign language in a week.
别指望一个星期就能学会一门外语。
If you would have a thing well done,do it yourself.
想把事情来做好，就得亲自动手搞。
It took great imagination as well as patience for Annie to teach me to speak.
教我说话需要极大的想像力和耐心。