Underfilling
不[未充]满, 底层填料
🗣️ 情景例句
I would like to tell you more about it.
我很乐意向你说得更详细一点。
Steady wins the race.
从容就是赢得比赛的诀窍。
Then he spoke slowly, but I could not understand him.
于是他说得慢了，可我还是听不懂。