The flier flew a new - type jet plane.飞行员驾驶一架新式喷气机.Do you have to print on a flier for everything?你非得把所有的事情都打印在传单上 吗 ?The flier is flying a new - type jet plane on trial.飞行员正在驾驶一架新式喷气机作试验飞行.Studies the hypervelocity laun...
Certain pigment colours were painted on to dry plaster using tempera (where egg yolk is used to fix the pigment).使用蛋彩画颜料（内含可以定色的蛋黄）在干石膏上绘出了特定颜色。So studying Tempera is significant to develop the modern painting material.研...
This paper summarized classification, functions, varieties of colorant and factors affecting coloration of salmon and bulltrout.本文阐述了着色剂的分类及作用 、 着色剂种类的选择及影响鲑鳟鱼着色效果的因素....