Melanoplakia
黑斑病; 口粘膜黑斑
🗣️ 情景例句
We want to keep customers happy.
我们必须让顾客满意。
I've got a pain in my back.
我的后背有点疼痛。
Warn the trucking company to take it easy.
吩咐卡车运输公司要小心啊。