In fact it is free of charge at the weekend.

事实上，在周末这是免费的。

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Part of the appeal is how easy it is to use: Customers can sign up to receive daily deals free of charge.

更具有吸引力的是整个过程是如此的简单：消费者通过注册可以免费获得每日购物提醒。

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Another way to make recycling cheaper is to get the household or business that generates the waste to sort it free of charge.

让废品的制造者——家庭和企业无偿地对废品进行分类，是另一个降低废品回收成本的办法。

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Since the Vivo Tab RT is a traditional tablet with an optional keyboard dock accessory (though it is currently included free of charge), the tablet itself is thin and light.

FORBES: First Impressions: ASUS Vivo Tab RT

The government said it is simply providing the software free of charge, as a pre-installed file on computer hard drives or as a CD, to give users to choice to install the software.

CNN: China delays Green Dam Internet filter