在美国法的判例与理论中，还有一些概念也类似地表达了同样的要求，例如：公道手段（the reasonable alternative）、管制精确性（precision of regulation）或者必要性（necessity）.
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Asking users to type in the IATA code is a reasonable alternative to forcing them to scroll through hundreds of possible airports.
与要求用户滚动查找数百个可能的机场相比，要求他们输入IATA编码一个不错的替代方法。
With all reasonable means of resistance exhausted and with certain death the only alternative, capture does not simply dishonor.
当所有可能的抵抗手段都耗尽，而死亡是唯一的结局时，被俘不是耻辱。
Is there a reasonable alternative design that would have avoided the plaintiff's injuries?
是否存在本可以避免原告受伤害的合理的替代设计？
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