Optional audit
[经] 任意审计, 遂意审计
🧩 词语组成解析
🗣️ 情景例句
Hmm. It's probably nothing.
嗯， 也许没什么事。
As you all know, doing business is not an easy thing to do.
大家都知道，做生意并不是一件容易的事。
The further off this solid obstruction, the longer time will elapse for the return of the echo.
固体障碍物越远。回声返回所用时间就越长。