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所谓常绿树木,一般是指冬季不落叶树木,并非一年四季永不落叶。它们跟一般树木生理的特性一样,老的叶子终究要落掉,新的叶芽也终究会长出来,只是新陈代谢的周期不同而已。在春夏秋冬四季分明的广大地区,与一般树木相反,大多常绿树木的落叶时间是在暖意融融的春天,它是和新芽的萌发同时进行的。老叶尚未落尽,新叶已经长成,从而象征生命的绿色常披枝干,使“新”和“旧”之间融为一体,遮住了人们视觉上的时间“间隔”。正因为此,人们才用“常绿”冠之。
The so-called evergreen trees, generally refers to the winter does not deciduous trees, not leaves all year round. They are the same as the physiological characteristics of trees in general, the old leaves will eventually fall off, new leaf buds will eventually grow out, but the cycle of metabolism is different. In spring, summer, autumn and winter, with four distinct seasons, contrary to common trees, the deciduous time of most evergreen trees is in the warmth of spring, which is simultaneously with the germination of new shoots. The old leaves have not yet been exhausted, the new leaves have grown into a green symbol of life, and the integration of “new” with “old” has covered the visual “time gap” between people. Because of this, people use the “evergreen” crown.