By practicing more frequently, you can surely conquer your fear of giving a speech in public.

通过更频繁的练习，你肯定可以克服在公共场合发表演讲的恐惧。

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You must conquer your fear of height.

你必须克服恐高症。

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You must conquer your fear of driving.

你必须克服驾驶车辆的恐惧心理。

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And so I say to this Congress and this country, something that runs deep in your character and is woven in your history, we conquer our fear of the future through our faith in the future.

BBC: In full: Brown's speech to Congress