His joke provided some comic relief in what was really a dull speech. 他说的笑话给极沉闷的讲话增加几分轻松气氛。
Many people are shy to tell a joke, because they have once told dreary jokes, or they are afraid of showing their stupidness ,or hurting others. 很多人羞于讲笑话，因为他们曾经讲过一个让人感觉沉闷的笑话，或者是他们害怕表现出自己的愚蠢，或是怕讲笑话伤害到别人。
