Contrast is critical, best achieved with black writing on a white screen.

对比很关键，白色屏幕与黑色字迹的对比最为强烈。

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They waved their black flags with white Arabic writing on them in the air.

他们挥舞着黑色旗帜，上面写有白色阿拉伯文字。

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They waved their black flags with white Arabic writing on them in the air.

他们挥舞着黑色旗帜，上面写有白色阿拉伯文字。

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