Pavonite
块硫铋银矿
🗣️ 情景例句
She is a terrible student.
她是一个极糟的学生。
This offer must be withdrawn if we haven't received your reply within five days.
如果5天之内我方未必到贵方答复，该盘撤消。
The nurse assisted the doctor in the operating room.
护士在手术室协助医生动手术。