研究和评价方面的要求及方法是复杂的。
Requirements and methods for research and evaluation are complex.
对于城市风貌，历来多采用定性描述的方法进行研究和评价。
Methods of qualitative description have constantly been applied to the research and evaluation on townscape feature.
目的研究和评价静脉腔内激光治疗下肢静脉曲张的临床效果。
ObjectiveTo evaluate the effect of varicose vein of lower limbs treated by intravenous laser treatment .
应用推荐