Mechanical efficiency
[机] 机械效率
🧩 词语组成解析
🗣️ 情景例句
You've been very thoughtful.
你一直都很周到。
What is the weather like in this country?
这个国家的气候如何？
She is a strong swimmer and many people feel that she is sure to succeed.
她是一个游泳能手，很多人认为她一定能成功。