favourite subject的用法和样例：
例句
- Father always fetches the conversation round to his favourite subject.
父亲总是把谈话转到他最喜爱的话题上来。 - Oh dear, he's off again on his favourite subject. Isn't there any way of stopping him?
天哪，他又在絮絮不休地谈他感兴趣的问题。有没有法子使他闭嘴？ - Chemistry was her favourite subject at school.
她上学时最喜欢化学。 - Which is your favourite subject?
你最喜欢哪个科目?
