Be careful while traveling.

旅行时要小心。

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Remember to bring some extra cash with you for emergencies while traveling.

旅行时记得随身多带点现金以备急需。

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These new findings should help airplane passengers to feel less vulnerable to catching respiratory infections while traveling by air.

这些新发现应该有助于乘客在乘坐飞机旅行时不那么容易感染上呼吸道病毒。

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She wrote the book in seven weeks while she was traveling in Haiti.

VOA: special.2009.02.22

Pinkowski Week comes to a close with a photograph Jennifer shot while traveling through Indian-controlled Kashmir.

FORBES: Daily Travel Flashback: Srinagar, Indian-Controlled Kashmir

They're also given water and sports drinks but never soda while traveling on planes and buses.

WSJ: Louisville: Winning With a Helping of Grease and Sugar��NCAA Tournament

On March 24, 1998, while traveling in Africa, the president was asked about executive privilege.

CNN: Transcript: Judiciary Committee impeachment hearing