城市绿化要以树木为主近几年来，许多城市的绿化步伐较大，效果显著。但有些地方由于指导思想有偏颇，在绿化植物的品种结构上不尽合理，存在着重花草、轻树木的问题。有的街旁游园、街心公园乃至校园在改造时，砍掉了树木栽花草；有的道路在拓宽时，本可保留的树木砍掉了... Urban afforestation should be dominated by trees. In recent years, the greening pace of many cities has been significant and the effect has been remarkable. However, due to the biased guiding ideology in some areas, the structure of green plants is not reasonable, and there are problems with heavy grass and light trees. Some street-side gardens, street-center parks, and even campuses are cutting down trees and planting flowers. When some roads are widening, trees that could have been kept are cut down...