the circadian clock is linked to nature's cycle of dark and light. 4582 什么意思？

生物钟与自然的昼夜循环有着联系。nature's cycle，自然循环dark and light是昼夜之意。light是光，指白天，nature's cycle of dark and light 合起来就是自然的昼夜循环。 希望帮到你！