It's not absolutely guaranteed that the double element in the request document contains exactly one text node.

不能绝对保证请求文档中的double元素仅包含一个文本节点。

youdao

In the XML-RPC example, you need to read only one thing in the input: the double element, of which there should be exactly one. To do that, you look for the start of an element with the name double.

在XML - RPC例子中，仅需要读取输入中的一个元素：double元素，该元素应该只有一个。

youdao

In order to solve the problem of health monitoring at local area of large Bridges, a double-element substructure method to identify the physical parameters of bridge structures is proposed.

为了解决大型桥梁结构局部区域的健康监测问题，提出了一种用于桥梁结构物理参数识别的双单元子结构法。

youdao

Despite these headline negatives, the sector has performed very well in recent months, maintaining an element of price stability while continuing their double-digit dividend yields.

FORBES: Agency REITs Keeping Portfolios Safe During Volatility