With all the lesson preparation I have to do I work 12 hours a day.

　　加上必須的備課在內，我每天工作12個(gè)小時(shí)。

　　The accident taught me a lesson I'll never forget.

　　這次事故給了我一個(gè)終生難忘的教訓。

　　The accident taught me a lesson I'll never forget.

　　那事故給我的教訓永遠也不會(huì )忘記。

　　I've got a piano lesson later today.

　　今天晚些時(shí)候我有一堂鋼琴課。

　　The class settled down and she began the lesson.

　　全班安靜下來(lái)她便開(kāi)始上課了。