Refurbished means restored - made better, and to retighten, is simply to tighten again.

翻意味着恢复——好，而重拧紧，就拧紧。

The three words were: recycled, refurbished and retighten.

这三个词：回收、翻和重收紧。

We looked before at the word 'retighten', which means 'to tighten again'.

我们之前看过“retighten”这个词，意思“收紧”。