Prepurification
预纯化(作用)
🗣️ 情景例句
On a studect visa, full-time work is not permitted.
持学生签证的话，不允许做全职工作。
He who pays the piper, calls the tune.
谁负担费用，谁加以控制。
With a stopwatch, they counted how many times the bees repeated the dance during one minute.
他们用秒表记录蜜蜂在一分钟内重复舞蹈的次数。