这种极端的要么全有要么全无的结局，远不及吸血鬼和男巫类作品那样平易。

Such extreme all-or-nothing outcomes are far less common in the vampire and wizard canons.

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但无人驾驶汽车的最强大商业理由来自于更为彻底的、要么全有要么全无的一步：消除对人类驾驶员的需要。

But the strongest business case for driverless cars comes from the more radical, all-or-nothing step of eradicating the need for human drivers.

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