Not all gadgets are available to install as extensions through the extensions Gallery or manually.
并非所有的小工具，都能通过扩展库安装或手动安装。
Once you've found your way to the extensions Gallery, installing featured gadget extensions is a breeze.
一旦找到扩展库，安装小工具扩展项就是件轻而易举的事了。
Most of the gadgets listed here are available through the Extensions Gallery we covered previously, so they are easy to install.
这里列出的小工具大部分都可通过我们上面提到过的扩展库找到，所以它们很容易安装。
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