Underfilling
不[未充]满, 底层填料
🗣️ 情景例句
You are twenty-one, a grown-up young lady old enough to make up your own mind.
你已经21岁了，已经到了可以自己做主的年龄了。
Experience is the father of wisdom and memory the mother.
经验是知识之父，记忆是知识之母。
This lunch is on me today,
今天这顿饭算我请客。