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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We have a spare generator in case of power cuts.

我们有一台以防断电时使用的备用发电机。

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We have a spare generator in case of power cuts.

我们有一台以防断电时使用的备用发电机。

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