S-12:shift gears 变速
A:How was today's lecture?
A:今天的讲座怎么样？
B:It was so boring at first but then the speaker suddenly shifted gears. The lecture became so exciting.
B：刚开始非常无聊，但讲话的人突然改变了方式，使讲座变得让人兴奋不已。
A:And he won the praise of everybody at last?
A:他最终获得了大家的赞赏？
B:You said it.
B：你说得对。
