1、第一课，Lesson One。lesson英[ˈlesn]美[ˈlesn]，one英[wʌn]美[wʌn]。

2、双语例句：让我们从第一课开始。Lets begin with Lesson One.这可能不是大多数毕业演讲的人会说的话，但这是成长的第一课。Its probably not something most graduation speakers would say, but its the first lesson of growing up.