Sorry, perhaps I did not make that quite clear.
对不起，也许是我没有说清楚。
Sorry, perhaps I did not fully explain that.
抱歉,也许我对这个问题的解释不够充分。
Sorry, perhaps I did not explain fully enough to make you understand.
抱歉，也许是我解释充分，所以没能让大家理解。
Sorry, perhaps my explanation was not good enough to make you understand.
抱歉，也许是我的解释不到位，所以没有让大家理解。