Invoking the toUpper function is required in order to determine whether or not the tuple satisfies the query.

要确定元组(tuple)是否满足查询，必须调用toupper函数。

youdao

The first statement calls a function (in this case, toUpper, which converts a character to uppercase) on each element of a list.

第一个语句在列表的每个元素上调用函数(本例中为toUpper，用于把字符转成大写)。

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It's passing to this function called toupper, which if you've never used it it actually does what it says it makes it touppercase.

它把这个传递给toupper函数，如果你们使用过，它表示的是把小写字母,转换为大写字母。

youdao

The implementation of this interface involves having each of the toUpper and toLower operations delegate to the appropriate command objects.

这个接口的实现分别包括指定到适当的command对象的toUpper和toLower操作。

youdao

For example, the toUpper service takes a single parameter named operand and returns the upper case transformation of the resource identified by the URI supplied as the argument.

例如，toUpper服务带有一个叫做operand的参数，并且返回参数uri所表示的资源的大写形式。

youdao

For example, the toUpper service takes a single parameter named operand and returns the upper case transformation of the resource identified by the URI supplied as the argument.

例如，toUpper服务带有一个叫做operand的参数，并且返回参数uri所表示的资源的大写形式。

youdao