For example, when you open a new Internet Explorer window, the back button is not available because you have no webpage to go back to at that time.

例如，当你打开一个新的InternetExplorer窗口，后面的按钮是不可用，因为你没有网页，回到那个时候。

youdao

For example, when you open a new Internet Explorer window, the back button is not available because you have no webpage to go back to at that time.

例如，当你打开一个新的InternetExplorer窗口，后面的按钮是不可用，因为你没有网页，回到那个时候。

youdao