Rosa：Slow down，Carl．I can't keep up with you． Carl：You walk as slowly as a snail． Rosa：How do you keep so fit? Carl：I work out as often as I can． 慢下来 罗莎：卡尔，走慢一点。我跟不上你。 卡尔：你走得跟蜗牛一样慢。 罗莎：你是怎么保持这么健康的呢? 卡尔：我尽可能地经常运动。