Look, he wears a red belt, so he must be a very good judoka.

看, 他系的是红带, 所以他肯定是柔道高手.

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For instance , judokas of the highest rank , that is, the tenth dan , wear a red belt.

比如说, 最高段位10段的柔道师系的是红带.

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Tom wears a red belt to work.

汤姆系红色的皮带去上班.

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