Now that SQL has helped obtain a subset of XML documents, the XQuery uses a let binding to a variable $total.

既然 SQL 已经帮助我们获得了 XML 文档的子集，XQuery 的操作范围就确定了；XQuery 使用一个绑定到变量 $total 的 let。

youdao

No, the percentage of time that the CPU spends handling interrupts is not a subset of the total busy time for that CPU.

不包括。 CPU 处理中断所占的时间百分比并不是那个 CPU 全部繁忙时间的子集。

youdao

The subset that is preloaded is roughly 20% of the total number of records but it fulfills 80% of the requests.

预装载的子集数据大约在总数的20%，但它能够满足80%的请求。

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