1·This is a var from Node (thus any graphical object can be rotated).
这是来自Node的变量(因此任何图像对象都可以旋转)。
2·Here we copy the current arg, indexed by argno (which was initially set to 1, to point to the first actual arg after the command itself) to string var s1.
这里，我们将由argno(初始时被设为1以指向命令本身后的第一个实际参数)索引的当前参数复制到字符串变量s1。
3·Back in Listing 6, you saw that we had a button whose action var was set to an inline function.
回到清单6，我们使用了一个按钮，它的action变量被设置为一个内联函数。
4·Alternately, you can declare a kind of object using the all-purpose instantiator var, which may use literals to define internal structures.
或者，我们可以声明一个使用通用实例的对象，它可能要用常量来定义内部结构，然后我们可以选择一个常量来为这个函数赋值，以使其具备变量的特征。
5·The button says "Search", and its action var is set to a closure.
按钮显示为“Search”，它的action变量被设置为一个闭包。