C505 Can't Do It

"What do you mean by that?" I asked.

When I had finished, he looked at me and then fell silent, but it was obvious that his expression was not very good at the moment.

I thought for a moment before continuing to ask, "Just what is the meaning of this? Explain it to me clearly."

"I don't think I need to explain this to you, and if I do, will you understand?"

When he finished, he looked at me