If travelling with a group, check the itinerary doesn't include activities that exploit animals.

如果随团出游，请查清楚行程里不会有利用动物来做的活动。

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To check that this was not so, the experiment was repeat six months later when the Earth was travelling in the reverse direction on the opposite side of its orbit.

证明那个是巧合的时候却发现不是这样的，在六个月后重复了这个实验，此时地球正在轨道的另一边以相反的方向运行。

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Check with health professionals for information on recommended vaccinations or other precautions and find out about overseas laws on travelling with medicines.

向护理专业人员查询有关建议的疫苗接种或其他预防措施，并了解有关携带药物旅游的海外法律。

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They are advising passengers to check with their airline before travelling or check the airport websites.

BBC: Snow and sleet forecast for Northern Ireland

"We would encourage all passengers travelling today to check with their airline or tour operator for the latest up-to-date information on their flight, " she added.

BBC: East Midlands Airport suspends flights to clear snow

Anyone travelling by rail is advised to check the Arriva Trains Wales website before travelling, as its services have resumed but disruption is expected for the rest of Saturday.

BBC: Flooding: Christmas rail travel resuming in south Wales