Effectuality
有效性
✅ 同义词
🗣️ 情景例句
They have to be here.
它们肯定就在这儿。
It's unlikely he's here.
看样子他不象在这儿。
No necessity of making a living away from home results in neglect of children,
人们没有必要离家谋生，所以不会产生孩子无人管的问题，