北方城市的街头大都种的是落叶树。每当秋去冬至,树叶随着天气的变冷,逐渐落在地上,只剩下光秃秃的枝头和树干在随风摇曳。或许,有的人认为是树叶的懦弱,有的人认为是贪生,有的人认为是树叶的无能,总之,总是有许多的闲言碎语。却忽略了树干为什么能在严冬时节仍然有顽强的生命力。俗话说:“叶落归根”。而这些正是由于树叶的毫不利己,牺牲了自己并转化为有机肥,为大地补充了丰富的营养, Most of the streets in northern cities are deciduous trees. Whenever the winter goes to the winter solstice, the leaves gradually fall to the ground as the weather becomes cooler, leaving bare branches and trunks swaying in the wind. Perhaps, some people think that the leaves are weak, some people think it is greedy, some people think that the leaves of incompetence, in short, there is always a lot of gossip. But ignored why the trunk can still have tenacious vitality during the winter months. As the saying goes: “Leaves fall back to roots.” And these are precisely the leaves of the self-interest, sacrificing themselves and into organic fertilizer, the earth added a wealth of nutrition,