增殖期糖尿病性视网膜病变
proliferative diabetic retinopathy
增殖前期糖尿病性视网膜病变
retinal neovascularization
非增殖期糖尿病视网膜病变
non-proliferative diabetic retinopathy
diabetic retinopathy in nonproliferative stage
社会经济转型期
socio-economic transition
设计周期负荷
cooling load of design period
设计使用期
the period of structure design
design life