a one-way ticket to
US /ə wʌn-weɪ ˈtɪkɪt tuː/
UK /ə wʌn-weɪ ˈtɪkɪt tuː/

1.
一张去...的单程票
a ticket that allows a person to travel to a place but not back
:
•
I bought a one-way ticket to London, as I plan to move there permanently.
我买了一张去伦敦的单程票,因为我打算永久搬到那里。
•
He booked a one-way ticket to Paris, hoping for a new beginning.
他预订了一张去巴黎的单程票,希望能有一个新的开始。
2.
通往...的单程票, 一条不归路
something that leads to a permanent or irreversible situation
:
•
Ignoring the problem is a one-way ticket to disaster.
忽视问题是通往灾难的单程票。
•
His reckless behavior was a one-way ticket to trouble.
他鲁莽的行为是通往麻烦的单程票。