The number of keyword holder documents per source document is the same as the number of search fields in each document.

每一个源文档的关键字持有者文档的数目与每个文档的搜索字段的数目相同。

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Is a place holder for the array of items that may be named differently depending on your data source.

是占位符，代表结果项数组，根据数据源的不同，该数组可能具有不同的名称。

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This paper describes the working principle and structure design of a laser probe ion source which is composed of an x-y-z manipulated sample holder, an optical system and an ion optical system.

本文介绍一种由三维样品调节器、光学系统和离子光学系统组成的激光探针离子源的工作原理与结构设计。

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