1.half past two
half past two 例句：
1.I'm sorry, sir, but our lunch specials go off at half past two. We can only serve refreshments now. Would you prefer something like that?
2.I reached my destination around half past two.
3.In the afternoon, I have art at half past one and I have an English lesson at half past two.
4.How about half past two tomorrow afternoon?
5.I passed the food shop at half past two and bought you the chocolate.
two thirty 例句：
1.I will see you at two thirty.
2.So we'll be at your office at two thirty next Tuesday afternoon.
3.Our main restaurant closes at two thirty, but you can get something to eat in the All-Day Coffee Shop. It's just across the lobby.
4.It's two thirty. Have some sandwiches.
5.They'll look at the projects in our classroom at two thirty-five.