He scowled, and slammed the door behind him...他怒气冲冲,摔门而去。He scowled his displeasure.他满脸嗔色.The teacher scowled at his noisy class.老师对他那喧闹的课堂板着脸.He just scowled at Mammy and passed it over.他只是对嬷嬷皱了皱眉头,就不再理会了.She scowled at...
添加的甲基汞的回收率据报到达90%左右.The recovery of added methylmercury was reported to be approximately 90 %.烯酮, 特别是二甲基烯酮, 很容易齐聚和聚合.Ketenes, notably dimethyl ketene, readily undergo oligomerization and polymerization.六亚甲基二异氰酸酯 ( HMDI )...