When I first came here 30 years ago, you would always hear lions roaring across the ranglands at night and see their tracks in the morning.

30年前我第一次来到这里，那时夜里经常听见狮子咆哮着穿越牧场，早晨起来还能看见它们留下的足迹。

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The main railway station in Duisburg was closed because of the number of young people wandering across the tracks, a railway spokesman said.

一名铁路部发言人称，由于一大群年轻人在轨道上来回穿越，杜伊斯堡的一些主要车站已关闭。

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But the migrants who arrive in the back of lorries and huddled in small boats are unskilled. For them, there are hardly any legal tracks across borders.

替技术移民辩护相对容易，可是非技术移民几乎都是采取非法途径过境，要么躲在卡车后部，要么挤在艘小船里。

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Although it was a limited-run program, hundreds of tracks by Miles Davis were beamed across the country, non-stop and commercial-free for five straight days.

VOA: standard.2009.12.25

The final lines highlight the dangers of standing on the edge of the rail platform and running across tracks.

BBC: Quiz of the week's news

That means that similar videos campaigns are often duplicated and opportunities to sell sponsorships across several tracks get lost.

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Often such places are abandoned or off-limits, and gaining entrance can mean running across subway tracks, crawling down storm drains or climbing up bridges, illegally.

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