孔隙面积efficient: adj. 1.有效的,有力的;效率高的。 2.有实力的; ...ligament: n. (pl. ligaments, ligamenta ...between: between three and four ...opening: n. 1. 开,开放;开始,着手;开端,开头;开场,开幕 ...openings: 走向世界下载手机词典可随时随地查词查翻译