Additionally, some "Getting Started" courses are available free of charge.

此外，一些“入门”课程是免费的。

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However, many people always keep their recharger plugged in. Additionally, many people charge their phones every night, whether they need to be recharged or not.

但是许多人在不考虑手机是否要充电的情况下，总是将充电器一直插在电器插槽上，有的甚至整晚都在给手机充电。

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