Lignin is a characteristic component of secondary walls.木质素是次生壁成份的特征.A new syntan product prepared with tar phenol and lignin sulfonic acid.以工业副产物木素磺酸和焦油酚为主要原料研制出一种新的合成鞣剂.Alkali lignin is an abundant, cheap and renewable...
各国对未经授权的飞越领空行为都会作出激烈反应。Nations react strongly to unauthorized overflights.当然, 国会授权的范围常常是模糊不定的.Of course, the scope of Congress'delegation is often indeterminate.以下各项原则是授权的准绳.The following principles are guides to de...
方向盘从我冻僵的手里滑脱, 汽车便横着穿过了马路.The wheel slipped from my frozen hand, and the car went right across the road.大卫猛地一拉,枪口终于从费伯的手中滑脱了.David tugged again and the muzzle slipped from Faber's grasp.那球他已接住却又从手中滑脱了.He caught the b...