She's proficient in several languages.她精通好几种语言。a technically proficient performance of the piece精湛的乐曲演奏She was very proficient in music.她非常精通音乐.Mr. Barret is not proficient in diagnosis, let alone investigation.巴瑞特先...
The barbaric slaughter of whales is unnecessary and inhuman.对鲸的野蛮屠杀既不必要也不人道。They will be concerned to cut back expenditure on unnecessary items.他们将会考虑削减不必要的开销。A union would infuse unnecessary conflict into the company...