The toolbar buttons can be used to clear the command history and list panes, import, export, and run lists of commands.
您可以使用工具栏按钮来清除命令历史以及列表窗格，命令的导入、导出以及运行列表。
2
A total of seven (7) books on science or the history of science appeared in these lists, which represents a small fraction of the total number of books listed.
这些书单里面一共出现了7本科学或科学史图书，仅占全部入选图书的一小部分。
3
Greene's book belongs on mystery, history, and social commentary reading lists.