The proportion of representation of the various parties is determined by established convention, negotiated between the parties.

代表比例由惯例或各党间协商决定。

youdao

It's simply a convention established after the fact that allows us to organize material in ways that we can grapple with it ways that we can understand it.

这仅仅是在事后建立的一种惯例,好让我们组织材料,用容易整理的方式,用容易理解的方式

耶鲁公开课 - 聆听音乐课程节选

Big news deserves big, bold, immediate moves that break the rules of established convention instead of emulating them, however expertly.

FORBES: Microsoft's Marketing Malfeasance

By long-established convention, they have autonomy in domestic policy, including fiscal policy.

ECONOMIST: Offshore financial centres

It was a well established social convention for women of more humble origins to move through service to older men with power as Jane does, she just does it more on her own terms than most.

FORBES: Jane Eyre: Lustful Feminist