As daylight dwindles and temperatures drop in this forest in Perthshire, Scotland, beech trees (Fagus sylvatica) switch into power-saver mode.

当森林里的白天在减短，气温在降低时，苏格兰佩思郡的山毛榉(Fagus sylvatica)就进入了一种保存能量的状态。

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As daylight dwindles and temperatures drop in this forest in Perthshire, Scotland, beech trees (Fagus sylvatica) switch into power-saver mode.

当森林里的白天在减短，气温在降低时，苏格兰佩思郡的山毛榉(Fagus sylvatica)就进入了一种保存能量的状态。

youdao