This is a hard rule to follow.
这个规则看来很难遵守。
这不是一个硬性的规则。
No hard rule dictates how long a line of code should be.
没有硬性规定一个代码行应该多长。
If there's one hard rule of childhood, it's that kids don't like fish.
要说童年有什么不变的规律，那就是孩子们都不喜欢吃鱼。
It is better to have a soft rule that is roughly right than a hard rule that makes no economic sense.
但一个基本正确的软性准则总比一个没有经济意义的硬性规定来的强。
The only hard rule the couple have to stick by is the 40 mile per hour speed limit the 83-year old car is restricted to.
这对夫妇唯一必须要坚持的硬性规定就是这辆“83岁”的老车时速限制在40英里以内。
The only hard rule the couple have to stick by is the 40 mile per hour speed limit the 83-year old car is restricted to.
这对夫妇唯一必须要坚持的硬性规定就是这辆“83岁”的老车时速限制在40英里以内。
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