Ulcus ambulans
[医] 崩蚀性溃疡
🧩 词语组成解析
溃疡
🗣️ 情景例句
Everyone gets a turn, going counterclockwise,
每一个人按逆时针方向，
If you agree to carry the calf, they'll make you carry the cow.
得寸进尺。
This time it was the postman and he wanted me to sign for a registered letter!
这次是邮递员，他要我签收一封挂号信！