Soviet citizens were prohibited from travelling abroad.

苏联时代的公民被禁止出国旅游。

《牛津词典》

When travelling abroad, people should be extremely careful of their actions as their misbehaviours will stain their motherland's reputation.

出国旅游时，人们应该多加留意自己的行为，因为他们不恰当的行为会玷污他们祖国的声誉。

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We should behave properly when travelling abroad.

我们在国外旅行时应该举止得体。

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She said following inquiries in 2009, police had been led to believe he was travelling abroad.

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Learn some tips for safely using wi-fi hotspots with your smartphone while travelling abroad.

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The three-and-a-half-hour trip is so seamless it is hardly like travelling abroad at all.

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