https://online2.tingclass.net/lesson/shi0529/0009/9907/269.mp3
https://image.tingclass.net/statics/js/2012
講解文本：
roll up our sleeves 擼起袖子
roll up 卷起來
sleeve 袖子
Let's roll up our sleeves and work hard.
讓我們擼起袖子加油干!
I always like to roll up my sleeves, it looks cool.
我一般喜歡把衣服袖子卷起來，因?yàn)檫@樣看起來酷。
瘋狂練習(xí)吧!
