Vicki: This is Real English from BBC Learning English. I’m Vicki.
Chen Li: 我是陈鹂。 在今天的`节目中， 我们要学的是什么呢?
Vicki: Today’s new expression is keep a straight face.
Chen Li: Keep a straight face. 你能解释一下吗?
Vicki: Well, it’s quite simple really. Keep a straight face means that you don’t laugh or smile, even though you are amused.
Chen Li: 据个例子怎么样?Vicki?
Vicki: Yes. When you were at school, if you laughed you might get in trouble and be punished, so you had to keep a straight face.
Chen Li: 我明白了。 ‘keep a straight face’ 就是说强忍着，不让自己笑出声或者是露出笑脸来，即使觉得十分滑稽可笑。Is it easy to use?
Vicki: Well, I think so, yes. Just remember ‘keep’ is a verb, so you’ll need to change the form of the verb sometimes.
So you could say ‘I kept a straight face yesterday’ or ‘I promise I will keep a straight face’.
Chen Li: 我知道了。
A: Look at that man’s hairstyle!
B: Keep a straight face! If he sees you laughing, he might get angry with us!
Vicki: When I was at school I often used to get in trouble for laughing when I should have kept a straight face.
Chen Li: 那你曾经是个坏学生哦!
Vicki: No, of course not C I just couldn’t keep a straight face sometimes!
Chen Li: 我知道有这个问题的。
Vicki: It can be hard to keep a straight face.
Chen Li: 但是这却是很重要的。
Vicki: Yes. If you don’t keep a straight face sometimes, people may get angry with you.
Chen Li: 是这样的。
Vicki: But, Chen Li, sometimes it’s ok to laugh.
Chen Li: 是的，看来我们所剩时间不多了。让我们复习一下:
Vicki: To keep a straight face
Chen Li: 意思就是忍住不笑出来。
Vicki: You’ve been listening to Real English from BBC Learning English. Join us again soon for more up-to-the-minute Real English. Bye.
Chen Li: 再见。