Presaturator
預飽和器
??? 情景例句
He's been here for years, he should know the ins and outs of the job by now.
他在這里已經好多年，現在理應熟悉各方面的工作了。
It was so beautiful it took my breath away.
它美得使我目瞪口呆。
I've got an idea.
我有個辦法。