always staying calm and controlled , even in difficult situations that would cause other people to worry
发音
例句
1. Thomas, of course, was cool and aloof and imperturbable. 当然, 托马斯沉着、冷漠,不易激动。 2. Edward was a model of good temper and his equanimity imperturbable. 爱德华是个典型的好性子,他总是沉着镇定。