我到现在都不敢相信这么棒的系统是免费的，你不仅可以随心所欲地对系统进行增加，调整和修改，而且不用为此花一分钱。

I still have trouble believing that this wonderful system is free, both in the ability to add, change, and modify it as you wish, but also free of monetary cost.

youdao

如果你抢先抓住一个有魅力的词(他们是免费的，出现在公众领域)并让它成为你的品牌名字，人们不会不愿意去想象所有美好的特征当这个词已经增加了意思，每当他们听到这个词的时候。

And in the public domain! and make that your brand name, people won't be able to resist imagining all the wonderful features of the word you've co-opted whenever they hear your brand name.

youdao

唯一你需要的是免费软件，可以发现在互联网上一个好的上网麦克风，喇叭、音效卡。

The only thing you need, is the software which can be found for free on the Internet, a good Internet connection, a microphone, speakers, and a sound card.

youdao