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信号， しんごう
1. signal, signalling, signaling
2. traffic light, traffic signal
信号；红绿灯
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青， 蒼， 碧， あお
1. blue, azure
2. green
3. green light (traffic)
4. black (horse coat color)
5. blue 5-point card
6. immature, unripe, young
tbd
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调
