If it is not a static class, you first need to declare the name of the field that will hold the reference to the parent class of the nested class before you get to the preview box.

如果它不是一个静态类，那么需要首先声明保存有对此嵌套类的父类的引用的那个字段的名称，之后才能看到这个预览框。

youdao

Use the preview function of the Configuration Manager to get a first impression of the default form template for the definition.

使用Configuration Manager预览功能取得对定义的表单模板的第一印象。

youdao

LINQ to XSD has first been announced by Microsoft's XML team in November 2006 (including a preview alpha 0.1 for the LINQ May 2006 CTP).

LINQ to XSD最早是由微软XML团队在2006年11月发布，其中包括一个为2006年5月LINQ的CTP发布的Alpha 0.1预览版。

youdao

The meeting, meant to preview the Mideast trip, was the first major session with such a large group of Jewish American leaders during Obama's second term.

CNN: STORY HIGHLIGHTS

Part of my job was to launch the first pull-out section announcing the formation of the league and a preview of all the teams.

CNN: Here's to Collins -- and the NBA

In its first month for the holiday preview issue, Babystyle would receive 50, 000 unique visitors to the website and currently features actress Jessica Alba and her two daughters on the cover of the spring issue.

FORBES: Entrepreneur Spotlight... Kaitlyn Kirby of Babystyle Magazine