Meaning of dì tiě:
dì tiě
地铁
Noun
underground railway; subway; subway train
Wǒ měi tiān zuò dì tiě shàng bān.
我每天坐地铁上班。
I take the subway to work every day.
Zǎo shàng wǒ chéng zuò dì tiě qù gōng sī.
早上我乘坐地铁去公司。
In the morning, I take the subway to the office.