中世纪时，drab（“本色布”）一词指的是一种农民用来制衣的非常普通的羊毛织物。In the Middle Ages the term "drab" denoted a very simple type of woollen cloth which was used by peasants to make their clothes.第七届广州国际纺织及制衣工业展览会开幕仪式现在开始!The opening ceremony of Ca...
Gravel strata is a kind of typical instable layer in drilling engineering.卵砾石地层是钻探工程中常见的一种典型的不稳定地层.The instable voltage of grid shortens the service life of street lamps.电网供电电压不稳定,致使路灯的使用寿命缩短.Our budget shrunk because of...