And we has also found some especial rules on the moving of Chinese economic barycenter.文章还发现,中国经济重心的迁移存在几个特殊的规律.Aibihu Lake is typical arid zone lake, it has arid zone ecosystem of especial everglade.艾比湖是典型的干旱区湖泊, 具有特殊湿地...
He edged the tool into the crevice.他把刀具插进裂缝里.a crevice in a wall墙上的裂缝...a huge boulder with rare ferns growing in every crevice.裂缝中全长着罕见蕨类植物的巨石I saw a plant growing out of a crevice in the wall.我看到墙缝里长出一棵草来.And a roach s...
Aim To study the synthetic method for the glutaric dialdehyde.目的研究戊二醛的新合成方法.The cross - linking reaction between dialdehyde compound and cellulose acetate raises the chemical stability of the material.通过二醛类与醋酸纤维素类材料的交联反应...