美 [ˈtrævl baɪ]
乘坐交通工具旅行：使用某种交通工具进行旅行的方式。
坐
To travel by bus.
乘公共汽车旅行。
I always travel by underground.
我总是乘地铁。
It'll work out cheaper to travel by bus.
算来还是乘公共汽车便宜些。
Long-distance passengers to and from Sicily travel by air and will doubtless keep doing so.
Back in the days before they really had airplanes the players would travel by steamship.
The light it cast was enough to travel by without using their night-vision goggles.
WHITEHOUSE: Medal of Honor for Staff Sergeant Salvatore Giunta