Massenfilter
[机] 四极质谱仪
🗣️ 情景例句
Things look black.
前途暗淡。
He would direct the workman to use his plans.
他为了执行自己的计划，给员工下了指示。
The city at one time must have been prosperous, for it enjoyed a high level of civilization.
这座古城肯定一度很繁荣，因为它曾享有高度的文明，