Some people had enough money to ride on the newest form of transportation: the airplane.

VOA: special.2010.01.11

that your form of transportation is causing each day on your way to school or work.

不用担心你每天上学或上班的路上，你使用的交通工具会引起污染。

地铁的好处 - SpeakingMax英语口语达人

Sure. I guess my favorite form of public transportation would have to be the subway.

当然可以。我想我最喜欢的公共交通工具是地铁。

地铁的好处 - SpeakingMax英语口语达人

Camels have served as an important form of transportation since ancient times.

VOA: special.2009.01.13

"Passenger trains are the safest form of transportation available with the exception of the elevator.

VOA: standard.2010.02.15

In time,railroads became the most popular form of land transportation in the United States.

VOA: special.2010.01.11