The main criterion is value for money.

主要的标准是钱要用得划算。

《牛津词典》

The main criterion of attending the 2-day festival is that you have natural red hair.

该庆典一年一度，共持续2天。 要想参与其中，主要标准就是拥有一头自然的红发，而且当天必须身穿白色衣物。

youdao

This paper suggests that deformation behaviour be the main criterion in the definition of mylonite.

在所提出的糜棱岩定义中，作者将变形行为作为糜棱岩的主要标志。

youdao

Officials have also said that national origin -- not ethnicity or religion -- is the main criterion used to single out detainees.

CNN: Balancing life and liberty

Rather than making a fetish out of passports, a better approach would be to use residence (especially tax residence) as the main criterion for an individual's rights and responsibilities.

ECONOMIST: Citizenship

The global importance of the event was no longer the main criterion for sensational treatment: it all depended on whether a sufficiently irresistible headline could be teased out of what might be a run-of-the-mill story.

ECONOMIST: Behind the headlines