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路灯通常装在行道树旁。经我室马常耕等同志调查,直接受灯光照射的杨树与柳树,过冬时被照部分冻死;如果照射面积大的话,全株死去。这是由于路灯通宵亮着,使植株日夜
Street lights are usually installed beside street trees. After investigation by Chang Maogang and other comrades in our room, the poplars and willows directly shone upon the light were frozen to death in the winter when they were exposed to light. If the irradiation area was large, the whole plant died. This is because the lights are on overnight and the plants are day and night