The paper puts forward an automated testing case generator algorithm which uses equivalence class division methods and formal specification.

本文提出了一种从形式规格说明中利用等价类划分的方法自动生成软件测试用例的算法，给出了算法步骤。

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We have an auxiliary generator in case of power cuts.

我们有一台万一断电时使用的备用发电机。

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Before stopping the main generator in case of accident you should ask bridge for permission.

万一发生故障，在主发电机停车前，那应该征得驾驶人员的准许。

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Auctioneer Jonathan Humbert said the bus, which can hold 35 passengers, has just 28, 000km (17, 398 miles) on the clock and it has its own auxiliary generator and air supply in case anyone attacked it.

BBC: Margaret Thatcher's "Battle Bus"

In this case, the CrossBlue acts as an auxiliary electrical generator.

ENGADGET: VW unveils CrossBlue plug-in SUV with iPad mini headrests and 85MPGe efficiency (eyes-on)