Efficaciousness
n. 有效;灵验
🗣️ 情景例句
Yes. I have an upset stomach.
是的，我的胃很难受。
It's a poor mouse that has only on hole.
鼠只有一洞，必先把命送。
local epidemics of this disease could be created.
就可以使这种疾病在一个地区蔓延起来。