I did not have the foggiest idea what he meant.我根本不知道他是什么意思。I haven't the foggiest idea of how to solve this problem.我一点都不知道该怎样解决这一难题.I don't have the foggiest idea what the present is for.这个礼物是怎么回事我真是毫无头绪....
I did not have the foggiest idea what he meant.我根本不知道他是什么意思。I don't have the foggiest idea what the present is for.这个礼物是怎么回事我真是毫无头绪.'How often does it need to be changed?' — 'Haven't the foggiest...