他的发音有些非标准，但我们还是能听懂。

His pronunciation is a bit ___non-standard, but we can still understand him.

老师纠正了学生使用非标准英语表达的习惯。

The teacher corrected the student's use of ___non-standard English expressions.

这份合同使用了非标准的条款，可能无法得到法律认可。

This contract uses ___non-standard terms that may not be legally recognized.