这句话口语怎么说~

that's too bad
it seems that none/neither of us knows very well about this field. maybe we should go back and do some research , what do you say?

It's really too bad！
It seems that neither of us knows well about this field. Maybe we should go back and do some research. What's your opinion?

it is so bad~(what a pity~~)

we have no idear about this area ,may be we should just go back and check it

Its terrible, both of us(or all of us if you guys are more than three people) don't know this area very well, we'd better just go back to chech (the imformation) again, how do you think?