百度作业网请问我的这个有什么语法错误吗?帮忙改正下,
来源：学生作业帮 编辑：百度作业网作业帮 分类：英语作业 时间：2024/05/22 01:57:23
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？
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？
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
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
请问我的这个有什么语法错误吗?帮忙改正下,
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