Moving from spring to winter, active yang is inevitably followed by dormant yin.

春去冬来，阳盛不可避免地被伏阴所取代。

《柯林斯英汉双解大词典》

Most scientists think that phytoplankton are dormant in the winter and flourish in the spring because an increase of sunlight, warmer temperatures, and abundant nutrients.

大多数科学家认为，由于增加的日照、温暖的温度以及丰富的营养的原因，浮游植物在冬季休眠，而在春天蓬勃发展。

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When winter comes, it is dormant, but it comes back to life when spring returns.

当冬天来临的时候，它就进入了睡眠状态，但当春天来临时它又恢复了生机。

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Sinn Fein spent the spring trying to convince unionists that the IRA was now dormant.

BBC: NI's relief at peaceful summer