现在，我们必须剃光头，从而在不使用水的情况下保持清洁。

Now, we have to shave our heads to keep them clean without the use of water.

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她说，她祖母认为得剃光头才能把它弄出来。

She said her grandmother reckoned you had to shave your head to get it out.

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剃光头有助于提高成绩。

Shaving down contributes to peak performance.

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