Efficaciousness
n. 有效;灵验
🗣️ 情景例句
Who was it?
谁来的电话
When Alex began to argue, Richard burst into a rage.
当阿列克斯开始争论时，理查德便大发雷霆。
the necessary method of study is to group the relevant material and to take note of all possible variant forms and conditions.
应采取的研究方法是，把有关各方面的材料汇集起来，同时注意任何可能出现的异常情况和条件。