While travelling she missed the comforts of home.

旅行期间她想念家里的舒适。

《牛津词典》

While travelling in a strange place, you'd better watch the local people and follow their customs.

在一个陌生的地方旅行，你最好观察当地人，遵循他们的习俗。

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Luckily, they owned a caravan, a kind of car designed for people to live in while travelling.

幸运的是，他们有一辆大篷车，一种为人们旅行时居住而设计的汽车。

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Mr Myers was stabbed repeatedly while travelling on a bus in the heart of the Jewish community.

BBC: Straw briefed on mosque attacks

It comes after three British soldiers were killed by a bomb while travelling though Southern Afghanistan.

BBC: Prince of Wales's Division band trains for Afghanistan

The reception isn't great while travelling at speed and doesn't work at all underground.

ECONOMIST: America is finally poised to get mobile television