Ulcerates
v. （使某物）形成溃疡( ulcerate的第三人称单数 ); （使）腐败
🗣️ 情景例句
Have you ever held a secretarial position?
你曾当过秘书吗？
The petroleum region is centered largely in the north.
那里的石油区大部分集中在北部。
We are all busy with work.
我们都忙于工作。