After being at sea for several years, salmon return in summer to the sites of their birth to spawn and die, and hardly feed along their final journey.

鲑鱼在海中生活数年之后，在夏季洄游到它们的出生地，产卵然后死亡。在这一路上它们几乎不吃东西。

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That would be normal practice, but it would delay the return journey and keep hundreds of passengers waiting in the departure lounge.

按理说那是惯例，但检修无疑将会推迟返程时间，让成百旅客在候机室苦苦等待。

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When they made this return journey, they began their characteristic nest-searching behaviour, quartering the ground in detail looking for the entrance, after travelling about ten metres.

返回时，它们特有的觅巢行为就开始了，即在行走了大约10米远后，它们会在地上仔细地刻下指向蚁巢入口的标记。

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It said passengers delayed by 300 minutes or more would be offered a free return journey in the same class of travel as well as a cash refund for the delayed part of the journey.

BBC: Delayed passengers arrive at St Pancras

Powered by wind, solar panels, gel batteries and a foot crank, Yrvind Ten will set sail from Ireland in a 48, 000 kilometer return journey around the globe.

CNN: November 29, 2012 -- Updated 0332 GMT (1132 HKT)

He travelled to Brussels from Ebbsfleet International station in Kent, but had chosen not to take his guide dog on the return journey.

BBC: Blind Eurostar passenger left stranded in Brussels