Nonproductive operation
[化] 辅助操作
🧩 词语组成解析
a. 非生产性的, 对生产无直接关系的
🗣️ 情景例句
Help! Help! I can't swim!
救命！ 救命！ 我不会游泳
How much is a one-way ticket to Beijing?
一张到北京的单程票要多少钱？
Opportunity knocks but once.
机不可失，时不再来。