Ulcus rstundum
[医] 圆形溃疡, 胃溃疡
🧩 词语组成解析
溃疡
🗣️ 情景例句
Is everything all right?
一切都好吗？
I have an interview this afternoon.
我今天下午有面试。
and it is only in the seas and rivers, and sometimes lakes, where mud and sit have been continuously deposited,
所以只有在泥沙不停淤积的海洋和江河里，有时在湖泊里，