这些不稳定性促使琼脂糖和琼脂糖 -- 丙烯酰胺凝胶的发展.These liabilities prompted development of agarose and agarose - acrylamide gels.琼脂糖是一种天然的直链多糖.Agarose is naturally linear polysaccharide.方法: 淀粉 - 琼脂糖混合凝胶交叉电泳.Methods: Cross electrophoresis of...
She stooped down to pick up the child.她俯身抱起孩子。He stooped down, cut the stem for her with his knife and handed her the flower.他弯下腰，用刀替她将花茎割断，然后将花递给她。She was taller than he was and stooped slightly.她比他高，而且略微有些驼背。She stoope...