词Drivers must be on the alert for traffic signals.
驾驶员必须密切注意
信号。
信号；讯号，指挥
Drivers must be on the alert for traffic signals.
驾驶员必须密切注意信号。
The traffic signal lamp provided by the invention ensures that people with achromatopsia can also identify the traffic signals.
本发明提供
信号，使得了色盲症人也能辨识信号。
The traffic signal lamp of the important composition part controlled as the traffic should internationalize too.
作为控制重要组成部份信号也应国际化。
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