The first few lines retrieve the values from the drop-down list boxes in which the user selects usage and configuration, respectively.

前面几行代码分别从用户选择用法和配方的下拉列表框获取值。

youdao

Lines 49 to 52 define the menu and MenuItem for the add, find, and clear actions, which can be accessed from drop-down menus when the application is deployed and run.

第49到52行定义“添加”、“查找”和“清除”操作的Menu和MenuItem，当部署和运行应用程序时可以从下拉菜单使用它们。

youdao