The first part of the expression contains the namespace declarations (in this case, UBL 2.0 Invoice) and some auxiliary namespaces; these are used to ensure uniqueness of all element names used.

表达式的第一部分包含名称空间声明(在这里是UBL 2.0 Invoice)和一些辅助名称空间；这些名称空间用于确保使用的所有元素名的惟一性。

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Intervening IAP expression or function in tumor cells has already been studied as an auxiliary therapy of traditional tumor treatment.

干涉IAP分子在肿瘤细胞内的表达或功能已被作为肿瘤传统治疗方法的辅助治疗方法来研究。

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The pity is that the first auxiliary directrix after modification is generally expressed in an algebraic form, because of the complexity of the vectorial expression.

遗憾的是，由于其矩阵表达式有些复杂，一般都将修改后的第一辅助准线表示为代数形式。

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