The results show that the ASB materials are the new PM antifriction materials for aerobat.并且提供批量零件供现场使用,结果表明,该材料完全满足航空使用工况要求,是一种具有广泛应用前景的新型粉末冶金自润滑减摩材料.Special formula for the rubber wheel, antifriction, aging resistance ...
The characteristics of antifungal constituents in thefamilies of Gramineae, Leguminosae, Rosaceae, Compositae and Cruciferae were emphasized.侧重介绍了禾本科 、 豆科 、 蔷薇科 、 菊科和十字花科植物中抗病原真菌的活性物质的特点.Alfalfa is a member of the legume...
Some are cleaning the windows, others are mopping the floor.有的人在擦窗子, 另一些人在拖地板.A number of them took to mopping all day long.他们中有很多人总是愁眉苦脸.She went stealthily, mopping her flushed , stained cheeks, frightened, angry, very...
He vainly hope to travel round the world on foot.他梦想步行周游世界.The team captain vainly tried to rally his troops.队长试图振作部队的士气，但没有成功。He shouted after them, vainly trying to attract their attention.他在他们的后面高喊，想引起他们的注意，却是徒劳。I vai...
The cocoa industry dwindled because it became increasingly difficult to cover costs.由于越来越难以收回成本，可可产业日渐衰落。The factory's workforce has dwindled from over 4,000 to a few hundred...工厂雇员总数已经从 4,000 多人减少到几百人。Longfellow, L...