Aphthous ulcer
[医] 口疮性溃疡
🧩 词语组成解析
[医] 口疮的
ulcer
['ʌlsə]
n. <医>溃疡;腐烂物;道德败坏;
🗣️ 情景例句
and I promised to have lunch with both of them today.
我答应今天和他们共进午餐。
He is unworthy to live who lives only for himself.
为己而生，生而可耻。
Your English is improving little by little.
你的英语正在渐渐提高。