我很快发现我最喜欢这份工作的地方是，这是份户外工作，可以看到四季变换中这个城市的变化。
I soon found that what I liked best about this job was being outdoors, seeing how the city changes from season to season.
气候变化也影响了四季的更迭。
生物钟控制动物吃东西、睡眠及繁殖的时间：生物钟有助于动物适应四季的变化，这一点极其重要。
This clock governs when an animal eats, sleeps and reproduces: it is hard to overstate how important it is at helping animals adapt to changing conditions throughout the seasons.
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