At the South Pole, in a region of continuous darkness, humans could access water to produce hydrogen and oxygen.
月球南极是一个持续黑暗的区域，在这里，人类能够接触到水，以生产氢和氧。
Under condition of continuous darkness, cryophase duration, thermoperiodic response threshold and thermoperiodic amplitude play important roles in the determination of diapause in insects.
在全暗条件下，温周期本身通过低温持续期、温周期反应阈值、温周期幅度决定昆虫的滞育发生。
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