Ulcus
溃疡
🗣️ 情景例句
Oh yes, the May Fourth Movement. I've read about it.
哦，是的，五四运动，我听说过。
Where can I wash my hands?
请问洗手间在哪里？
Can I have the key to the front door please?
我能带上前门的钥匙吗？