重点讲解：
1. set one's mind 下定决心；拿定主意；
He set his mind on becoming a writer.
他认准了要当作家。
2. dedicate oneself to sth. 献(身)；投(身)；致力；
He dedicated himself to academic work.
他献身于学术工作。
3. apart from 除…外（尚有）；此外；
His one weakness, apart from aeroplanes, is ice cream.
除了对飞机情有独钟，他还嗜好冰激凌。
4. excel in 突出；擅长；胜过（他人）；
He excels in multiple-choice questions.
他擅长做选择题。