Ulcus penetrans
[医] 穿透性溃疡
🧩 词语组成解析
溃疡
🗣️ 情景例句
Why don't we get in the car and drive home?
我们何不开车回家？
He can't come and he sends his apologies.
他为他的不能前来致歉。
I was doing my homework and forgot the time.
我在做家庭作业，忘记了时间。