biological clock
柯林斯词典
1. N-COUNT Your biological clock is your body's way of registering time. It does not rely on events such as day or night, but on factors such as your habits, your age, and chemical changes taking place in your body. 生物钟[oft poss N]
For women, the biological clock governs the time for having children. 对于女性，生物钟控制着孕育子女的时间。
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biological clock (biological clocks)
剑桥词典
- your body's natural habit of sleeping , eating , growing , etc. at particular times
生物钟；生理钟
Long-haul flights can seriously disrupt your biological clock . 长途飞行可能会严重扰乱你的生物钟。