Stop when the signal light is red.
信号灯是红色时就停下来。
A red light is usually a signal of danger.
红灯通常是危险的信号。
A red light is a signal of danger.
红灯是危险的信号。
The signal values are standard, meaning green, yellow, and red light.
信号值是标准，这意味着绿色，黄色和红色光。
A red light is usually a signal of danger.
红灯通常是危险信号。
A red light is usually a signal of danger.
红灯通常是危险信号。
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