多数情况下，有个后备的B计划是个好事。

In most cases, having a Plan B is a good thing.

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许多工厂为了应对断电而使用后备的柴油发电机，这导致了加油站排起长龙，因为驾车人士都赶在储备枯竭前蜂拥到加油站购买柴油。

Many factories have tried to beat the cuts by turning on backup diesel generators, leading to long queues at filling stations, as motorists rush to buy diesel before stocks run out.

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例如，雪佛兰伏特在耗尽电池提供的65公里(40英里)行驶里程后仍然拥有一个后备的燃油动力发动机(以提供动力)。

The Volt, for example, has an additional petrol-powered generator to run the car when the battery's 65km (40 mile) range has been exceeded.

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The question of censorship and the telling of lies is introduced, in other words, as a question of military necessity, controlling the guards or the auxiliaries of the city, its warrior class.

审查的问题,及说谎的导入，换句话说，就像军备的问题，控制守卫人员,或说是城市的后备，战士阶级。

耶鲁公开课 - 政治哲学导论课程节选

we just piled up all the groceries in the trunk of the car and drive home.

我们会把杂货堆放在车的后备箱里，然后开车回家。

与众不同的纽约 - SpeakingMax英语口语达人

how can you have a platonically just city if most people in it, certainly most people of the auxiliary class are deprived of the pleasures ? and the goods that we desire?

如何建构一座柏拉图式的正义之城,如果大部份居住其中的人，尤其是那些后备阶级,所渴求的愉悦,与动产都己被剥夺？

耶鲁公开课 - 政治哲学导论课程节选