even-money
adjective [ before noun ] uk/ˈiː.vənˌmʌn.i/ us/ˈiː.vənˌmʌn.i/
（成功或失败的）均等机会;有均等机会的人（或事）
having an equal chance of winning or losing a competition, or used to refer to someone or something that has this chance
He has an even-money chance of winning the race. 他有同等机会赢得这场比赛。
the even-money favourite 同等喜好