two-way ticket的用法和樣例：
例句
- I want to change the date of my return ticket.
我想把往返票的日期改一下。 - Let me have a round-trip ticket to Detroit, please.
請給我來(lái)一張到底特律的往返票。 - I'll need an economy ticket with an open return.
我要一張經(jīng)濟艙，回來(lái)時(shí)間不定的來(lái)回票。 - I'd like to buy a roundtrip ticket to Honolulu.
我想買(mǎi)一張到檀香山的來(lái)回票。
