You can cross the street at a green light and you must stop at a red light.
问题描述:
You can cross the street at a green light and you must stop at a red light.
答
绿灯亮起你就可以过马路,红灯就得停下来
答
亮绿灯时你可以横过街道, 遇红灯时你的停下来
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