If the application is more complex and sophisticated, the menu space will be sorely needed, and opening and scrolling through a menu to find the right item may become laborious.

• 这种习惯用法最好用在具有简单结构的菜单中，如果应用过于复杂和精细，菜单占据的空间将会很大。 打开菜单、在菜单中移动鼠标找相应的条目将会很耗费时间和精力。