Underfilling
不[未充]满, 底层填料
🗣️ 情景例句
You think so?
你这样认为？
The committee adjourned to a larger hall.
该委员会将会议移至大一些的会议厅举行。
Litter baskets have been placed under the trees, but people still throw their rubbish everywhere.
树下都已设置了废物筐，但是人们仍到处扔垃圾。