Ulcus penetrans
[医] 穿透性溃疡
🧩 词语组成解析
溃疡
🗣️ 情景例句
Yes. I have an upset stomach.
是的，我的胃很难受。
Being on sea, sail; being on land, settle.
随遇而安。
Most of the parents will not be able to pay much money.
多数家长是付不起很多钱的。