So, the first topic will be setting up double integrals.

先来说说关于建立二重积分的事。

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The double equal sign is used for comparisons, rather than setting values.

双等于号用于比较而不是用于设置值。

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This means the default font setting in the system cannot display the characters for double-byte languages.

这意味着系统中的默认字体设置不能显示双字节语言的字符。

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