Best or nothingrather go without than have sth shoddy/
would rather go without(sth)than be contented with anything less satisfactory

以上是"宁缺毋滥"的英语表达

例句:
We must put quality before quantity.We would rather go without than have something shoddy.我们必须重视质量,宁缺毋滥.
参考资料：韦氏大辞典NQWL 缩写版