Sys is a standard module that contains useful values and functions; many other standard modules exist for you to use.

sys是一个标准模块，它包含有用的值和函数，还有其他许多标准模块可供使用。

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The Effects module has other functions that are very similar to show and hide , and ones that ultimately do the same thing; they just do it in a very specific manner.

Effects模块还有其他一些函数，它们与show和hide非常类似，并且最终所实现的功能也基本相同；只不过实现的方式不同。

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In the Events module, there are two functions, called bind and unbind , that appear on the surface to duplicate the efforts of all the other event methods.

在Events模块中有两个函数，它们是bind和unbind，用于完成所有其他事件方法的任务。

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