Making the quiet coach both an active choice and a costly one would dissuade many of those who do not value a peaceful ride.

如此一来，“安静座位”不仅可由乘客主动选择，高票价还可将大量不珍惜安静旅途的人拒之门外。

Rolls-Royce hesitated to replace their signature V12 engine responsible for the world famous quiet and smooth coaches.

Rolls-Royce 犹豫是否要更换其标志性的 V12 发动机，负责世界著名的安静和平稳的教练。