基本解释突咀英汉例句双语例句There existed an optimal dosage of the chain extender, lack of which caused deficiency of chain extension and excess of which led to more blocking reaction.扩链剂的用量存在最佳值，用量不足时偶联反应不充分，用量过量时封端反应加剧。专业释义纺织科学技术突咀