Selecting a MIDI file enables the Play button which is used to start the sequence.
选择MIDI文件将会启动Play按钮，它是用来排序的。
2
XPath provides primitives for moving around the XML tree, for selecting nodes according to name or by the use of a Boolean expression, and for applying functions to a sequence of nodes.
XPath 支持在 XML 树中移动、根据节点名称或通过使用 Boolean 表达式选择节点以及对一系列节点应用函数。
3
Words have individual value, and selecting the right sequence can affect your entire exchange.