gotta是什么意思？

Keep your head down意味着小心不被注意，当你想避免一些麻烦或不想陷入某种情况时使用它。例子： The boss was very mean at my last job. I kept my head down so I wouldn't get in trouble. （上次上班的老板很坏。他小心翼翼，不要卷入争吵。） 示例： You're going to be new in the school! Keep your head down and study hard. （你是新来的转学生！不要大惊小怪，好好学习。） 例子： Keep your head down. I don't think he saw you. Keep walking! （小心不要注意到。我认为他没有看到你。继续走！）