This focusing is the main reason that even relatively weak sounds in the ocean, especially low-frequency ones, can often travel thousands of miles.

正是由于这种集声，即使是海洋中相对微弱的声音，尤其是低频声音，也能传播数千英里。

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Why did she travel thousands of miles to come here?

她怎么会不远万里来到这里？

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Snow geese travel thousands of miles to their winter homes.

雪雁飞行数千英里去它们冬天的家。

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Davis still has thousands of miles to travel, months to go and a lot more wildlife to see.

CNN: Trekking 5,000 miles to connect man and wildlife

The baton, carried by thousands of runners, will travel 110, 000 miles through 71 countries on its way to Melbourne, Australia, for the games.

BBC: NEWS | UK | Scotland | Cash boosts Commonwealth athletes