After studying an hour, I finally got the hang of the lesson.
我学习了一个小时,终于理解了这一课的要点。
Oh well, better luck next time.
算了,下次的运气会更好。
When you come to think about it, there are only four ways you can deal with rubbish: dump it, burn it, turn it into something you can use again, attempt to produce less of it.