每輛車都有個駕駛員，不是每輛車都有乘客。

來源: 於 2017-10-17 07:54:30 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

These calculations take into account only deaths of drivers, not passengers, since every vehicle that crashes has a driver, but not every vehicle has passengers.