- 男高音
- tenor
- 男低音
- bass
- 难以
- hard to
- 难以
- difficult to
- 难以
- almost impossible to
- 难以回答
- find it difficult to give an answer
- 难以回答
- not know how to reply
- 难以启齿
- find it difficult to mention [or make a verbal demand]
- 难民
- refugee
- 难民问题
- refugee issue
- 难民营
- refugee camp
- 男中音
- baritone