这类运算符的适当使用不仅有助于机械地解析presentationMathML，还可改进文档的可读性。
The proper use of such operators helps not only in mechanically parsing Presentation MathML, but it also improves the accessibility of the document.
这类运算符的适当使用不仅有助于机械地解析presentationMathML，还可改进文档的可读性。
The proper use of such operators helps not only in mechanically parsing Presentation MathML, but it also improves the accessibility of the document.
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