因为我真的已经使用过这个产品，而且收效甚好所以我才推荐它。

I recommend it because I've actually used this product and have seen the results.

youdao

过去我已经使用过这些技术，下面是一些例子。

Below are some examples that I have applied this technique to in the past.

youdao

我已经看到这么多次，直到现在，但我从来没有使用过自己。

I have seen this so many times until now, but I never used myself.

youdao

我已经看到这么多次，直到现在，但我从来没有使用过自己。

I have seen this so many times until now, but I never used myself.

youdao