Effectivity
n. 有效, 功效
🗣️ 情景例句
Yes?
是吗？
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你还顶嘴！
In a short time I was busy mixing butter and flour and my hands were soon covered with sticky pastry.
不一会儿我就忙着调拌起了黄油和面粉，很快我的手上就沾满了粘粘的面糊。