你不能指望完美——毕竟，这只是你的第一堂课。

You can't expect to be perfect - ___after ___all, it was only your first lesson.

我停止了和朋友们说话，但时间不长——毕竟，我们是朋友。

I stopped talking with my friends, but not for long - ___after ___all, we are friends.

他没有完成项目——毕竟，他病了一整周。

He didn't finish the project - ___after ___all, he was sick all week.