S.t.u.
[医] 皮肤试验单位
🗣️ 情景例句
Don't waste your school years, son, they can determine your future.
孩子，别荒废你的学业，它们对你的未来有决定作用。
I went to visit an uncle of mine in San Francisco.
我去旧金山看望一个叔叔。
My friend, you shouldn't judge strangers always by the clothes they wear.
朋友，对于陌生人，你不应该老是凭人家的衣着来判断人。