S.t.u.
[医] 皮肤试验单位
🗣️ 情景例句
Some people don't mind being alone. I do.
有些人不在乎独自生活。 我在乎。
Mother's apple pie always tastes delicious.
妈妈做的苹果派很好吃的！
What are you doing?
你在干什么？