在英语毕业论文答辩时，如果答不上来，怎么用英语说“这个问题，我还没有详细研究，请老师给予指导”？

如果你研究深度没到，可以这么说：
I haven't go that deep into the problem, any suggestion?
如果问得是你没考虑的方面，可以这么说：
I haven't thought about it from that aspect, any suggestion?
事实上在答辩的时候要竭力避免这种情况，这是致命性的失误之一。无论你怎么回答导师们都会给你扣分的，最好还是要事先准备万全。

well, i haven't gone into this issue thoroughly. i'd appreciate it very much if you could give me some instructions.

I havenot researched this task in detail,Please give me some directions.