1. They work their eight hours a day, and don't mind the repetition a bit. . . .
    它们每天能做满8小时，而且对于干这种机械重复的活儿一点也不会有怨言。……

2. At first, I was scared, but Ron made me do it six times. With each repetition, I felt more confident.
    起先我很害怕，但罗恩让我做了6次。每重复一次，我的信心就更增强一分。