Optimum efficiency
[化] 最佳效率
🧩 词语组成解析
🗣️ 情景例句
from the first time you stayed with us.
自从你们第一次在我们这里住开始
He who makes constant complaint gets little compassion.
经常诉苦抱怨，难以博得同情。
Nearly all the sports practised nowadays are competitive.
现在开展的体育运动几乎都是竞争性的。