one-way
adjective uk/ˌwʌnˈweɪ/ us/ˌwʌnˈweɪ/
[ before noun ]单程的；单向的，单行的
travelling or allowing travel in only one direction
I drove the wrong way down a one-way street. 我在单行道上逆向行车。
How much is a one-way ticket to New York? 到纽约的单程票多少钱？
a one-way ticket to something 引发／导致（坏事）发生
If something is a one-way ticket to an unpleasant situation, it will cause that situation to happen.
A rejection of the peace deal would be a one-way ticket to disaster for the country. 反对和平协议将使国家陷入灾难。
These dull, formulaic comedies run for three or four episodes before getting a one-way ticket to television obscurity.
A season in some tiny, provincial theatre sounded like a one-way ticket to oblivion.
Climate scientists have warned that the world's current trajectory is a one-way ticket to disaster.
The current party leader is a one-way ticket to election defeat, that's for sure.
单方面的，一厢情愿的
A one-way relationship is not fair because only one person or group of the two makes any effort.