Ulcus rstundum
[医] 圆形溃疡, 胃溃疡
🧩 词语组成解析
溃疡
🗣️ 情景例句
How you doing?
你怎么样了？
I am at leisure now.
我现在有空。
That's why I didn't see the sign.
所以我才没看见那牌子。