both parties

基本解释

Both parties combated hand-to-hand for a long time, but neither side could win yet.
双方搏斗多时，不分胜负。
《新英汉大辞典》
After all, every four years, candidates from both parties make similar promises, and I expect this year will be no different.
毕竟，每四年，两个政党的总统候选人都会做出类似的承诺，我想今年也不会例外。
It serves the interest of both parties to argue about taxes on corporations and the wealthy because neither wants to discuss the alternative, which is where things get touchy.
在向公司和富人征税这个问题上的争来争去符合两个党派各自的利益，因为没有人想要讨论备选方案，这正是事情会变得敏感的地方。

Public protest was so great that both parties in the eighteen eighty-eight elections promised to pass a federal law against trusts.
The middle class he says is able to achieve the confidence of both extreme parties where at least it is sufficiently numerous to avoid the problems : of class struggle and factional conflict.
中间阶级，如他所言,能获致两种极端政党的信任,至少它的人数足以避免,阶级斗争与派系冲突的问题,亚里士多德写到。
耶鲁公开课 - 政治哲学导论课程节选
Both parties -- the Whigs and the Democrats -- had the same number of senators on the committee.

It also prohibits employers from hiring those workers, even if both parties would be better off.
FORBES: The Minimum Wage Delusion, And The Death Of Common Sense