There are many possible reasons why Biff was late, perhaps his car broke down, his babysitter did not show up, or there has been bad weather.

Biff 迟到的原因有很多，也许他的车抛锚了，保姆没上班，又或者是天气不好。

youdao

I didn't want to be a bad example, I hid my smoking from them. I smoked when they were sleeping or when they were with the babysitter.

因不想树立一个坏榜样，所以我都是背着她们抽烟的——在她们睡着了得时候或者她们跟保姆在一块的时候。

youdao