问题描述：
英语翻译
It's not essential that you do this at the start,but I am telling you this now
so that if you want to fill up your card before the course starts,that is what
I need to give you some money back.
求翻译这一段,尤其是that is what 这一句!它与前面那一句的关系是什么?
It's not essential that you do this at the start,but I am telling you this now
so that if you want to fill up your card before the course starts,that is what
I need to give you some money back.
求翻译这一段,尤其是that is what 这一句!它与前面那一句的关系是什么?
问题解答：
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