Expand the task bar by clicking the little arrow on the side, then right-click each icon in succession. If you find, for example, that programs like Skype and iTunes are whirring away even when you're not using them, right-click and select "Close"—or, better yet, open the program and uncheck any "launch at startup" settings in the Preferences or Options menu.

点击任务栏最左边的那个小箭头以展开它，然后用鼠标右键一个个的点击这些图标。如果你发现，比如说，当你没有在用的时候，“Skype”或 “iTunes”图标仍然存在，右键点击它们，然后选择“关闭”选项——或者，最好是在关闭之前，打开这个程序，在设置中找到“开机启动”选项，并取消勾选。

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