https://online2.tingclass.net/lesson/shi0529/0009/9907/304.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
straight face 板著臉，不動聲色，一本正經(jīng)的樣子
It was difficult to keep a straight face when I heard his joke.
聽完他的笑話，很難板著臉不笑。
My father never laughs. What he gives us is always a straight face.
父親從來不笑。他面對我們時候總板著個臉。
瘋狂練習(xí)吧!
