Underfilling
不[未充]满, 底层填料
🗣️ 情景例句
I don't know. The baby-sitter says she has a stomachache,
我不知道。临时保姆说她肚子疼.
We can't get good pictures on our TV set.
我们的电视机图象有问题。
Getting ready for Ann's party
准备安的生日。