Underfilling
不[未充]满, 底层填料
🗣️ 情景例句
Take heart, we'll find a way out.
振作起来，我们会有办法的。
On a crowded train, one comes in contact with many people.
在拥挤的火车里面，会和许多人接触。
My name is Liu Ying. I'm in Row 1. I'm Number 2.
我叫刘颖。我在第一排。我是2号。