您要查找的是不是：
- This distinction isn't hard and fast. 这样的差别并非是一成不变的。
- He stuck hard and fast to his principles. 他坚定不移地坚持自己的准则。
- You can't lay down hard and fast rules. 规则不能定得太严太死。
- The ship grounded hard and fast. 船搁了浅，动也不能动。
- There are no hard and fast rules in this game. 这种游戏没有什么严格的规定。
- You can not lay down hard and fast rules . 你不能制定严格的规则。
- No hard and fast line can be drawn between the two. 二者不能截然分开。
- There are no hard and fast rules about this. 这事没有什么硬性的规定。
- There is no hard and fast rule about dilution. 至于稀释程度，没有严格的规定。
- You can not lay down hard and fast rules. 你不能制定严格的规则。
- This is not a hard and fast rule. 但这并不是一个牢靠不变的规则。
- There are no hard and fast rules. 当然这个是没有任何硬性规定的。
- There's no hard and fast rule for writing. 写文章没有划一不二的公式。
- I didn't make any hard and fast decisions. 我没有做出任何不容更改的决定。
- The firm has no hard and fast rules to limit the scope of our work. 公司没有限制我们业务范围的严格规定。
- We must make it a hard and fast rule against smoking in the office. 我们必须严格规定：办公室里不准吸烟。
- There are no hard and fast rules for planning healthy meals. 在安排健康饮食方面，没有什么一定之规。
- In our workshop there is a hard and fast rule against smoking. 我们车间有严禁。
- We stuck hard and fast on the rocks in the middle of the river. 我们被阻滞在河当中的礁石上。
- Our factory has a hard and fast rule against smoking. 我们工厂严格规定不许吸烟。
