人类身高的变化遵循一种循环周期。

A. the change of human height follows a cyclic pattern.

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人类身高由于直立行走的姿势决定的。

B. Human height is conditioned by the upright posture.

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早期设计的高大机器人是人类身高的两倍，但后续版本将其身高降到正常水平。

Early design had towering droids twice the height of humans, but subsequent iterations brought its height down to normal size.

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