犯难
1.He was noted both for the intense masculinity of his writing and for his adventurous and widely publicized life.
2.It was almost as if, in the language of his poem "Kitty Hawk," Kennedy had been sent "As a demonstration / That the supreme merit / Lay in risking spirit / In substantiation."
3.Researchers presented a conundrum to new mothers on Monday, saying that women who want to lose the extra weight gained in pregnancy should try to get more sleep.

