请问我的这个有什么语法错误吗?帮忙改正下,the primary structure of XG contains pentameric repeat units which was formed by two D-glucose,two D-mannose and one D-glucuronic acid.Approximately onehalf of the terminals D-mannose contain a pyruvic acid residue linked via keto group to the 4 and 6 positions.这个句子有什么语法错误吗？
请问我的这个有什么语法错误吗?帮忙改正下,
the primary structure of XG contains pentameric repeat units which was formed by two D-glucose,two D-mannose and one D-glucuronic acid.
Approximately onehalf of the terminals D-mannose contain a pyruvic acid residue linked via keto group to the 4 and 6 positions.这个句子有什么语法错误吗？
XG的基本结构包含五聚体的重复单元， 该重复单元是由两个葡萄糖、两个倭勒米糖以及一个葡萄糖醛酸 组成的。
你的英文说法都正确！
稍作改动：
the primary structure of XG contains pentameric repeating units which are formed by two D-glucose,two D-mannose and one D-glucuronic acid
或者
the primary structure of XG contains pentameric repeating units formed by two D-glucose,two D-mannose and one D-glucuronic acid
repeat units 是专业术语吗?如果不是,建议改成上面建议的形式
units which are formed 中的时态无需过去时.which are 可以省略