请帮我翻译一下：我弄不懂他在上周的演讲中说的话（sense)

I could not sense what did he mean with the lecture last week.

I cannot make him the speech which said in the last week lecture (sense).
保证正确!

I can't make sence what was being said which he made the presentation last week.

I have no sense of what he said in his lecture of last week.

I can't understand what he's talking about in the last week's speech.

I didn't really catch what he said in his speech last week.

I made no sense of what he said in his lecture of last week.