- This is not a hard and fast rule.
- We must make it a hard and fast rule against smoking in the office.
- In our workshop there is a hard and fast rule against smoking.
- In our office building there is a hard and fast rule against smoking.
- Prior to Navis SPARCS and Navis PrimeRoute, one straddle per truck was a hard and fast rule.
在采用Navis SPARCS和Navis PrimeRoute之前,每辆跨运车配一辆货车是一个固定不变的规则。