The same also applies to controls (such as Buttons), although practically the ability to have a three-state checkbox is likely to be more directly useful.
这一技术同样应用到了控件上(如按钮)，尽管实际上有一个三状态选择框看起来更有用些。
2
One in three fourth-graders couldn't find their state on a map of the U.S.
四年级学生中有三分之一在美国地图上找不到自己所在的州。
《柯林斯英汉双解大词典》
3
Let's start off by creating threestate replicas (see Listing 1).