In europe , for instance , spring flowerings in 2000 occurred about 8 days earlier than they did in 1971 on average , and autumn events , such as changes in leaf colour , about 3 days earlier .

例如在欧洲，2000年春季开花的时间比1971年平均开花时间早8天，而在秋天，植物的变化如叶子变色等，则早了3天。