Floaters seem to drift through the field of vision.眼前似乎有东西漂过.Here and there a drift across the road was wet and slushy.路上不时会有吹聚起的积雪,泥泞而湿滑。...the drift towards the cities.涌向城市的趋势...a nine-foot snow drift.9英尺深的雪堆Final, imp...
Hexamethylene diisocyanate ( HMDI ) may be used in prepolymer, in place of TDI.六亚甲基二异氰酸酯 ( HMDI ) 可用在预聚物中代替甲苯二异氰酸酯〔TDI〕.R is tetramethylene, pentamethylene, or hexamethylene.R为四甲撑 、 五甲撑或六甲撑.Hexamethylene diisocysnate ( H...