fast-running

英 ['fɑːstr'ʌnɪŋ] 美 ['fɑːstr'ʌnɪŋ]

• n. 快行；打上料；加速冶炼

例句

用作名词 (n.)

1. Cars drive extremely quickly in the fast lane, so you should be careful.
   在快行线里，汽车的车速都很快，你要小心。