红灯的用法和样例：
例句
-
红灯常常是危险的信号。
A red lamp is often a danger signal. -
红灯通常是危险的信号。
A red light is usually a signal of danger. -
只要红灯一亮，就表示有危及职工的险情。
Only if the red light comes on is there any danger to employee. -
他开车闯红灯让警察看见了。
He drove through a red light (ie passed it without stopping) and a policeman saw him. -
他是这样没有耐心的司机，所以他闯红灯了。
He was such an impatient driver (=He was so impatient a driver) that he went through the red light.
