The rules are stringently enforced.

这些条例得到严格执行。

The regulations must be stringently observed.

这些规则必须严格遵守。

The regulations must be stringently observed.

这项规则没有得到严格遵守。

US officials believe these sanctions have not been stringently applied.

美国官方认为这些制裁没有得到很好的遵守。

You can choose to filter results more stringently or switch it off completely.

你可以选择性的让过滤系统更加严格或者把它完全地关闭。