这些取直的河道已经造成了许多奇怪的现象：它们把几个河边的城镇赶到荒野里去了，并在城镇前面筑起了沙坝还搬来了森林。

These cut-offs have had curious effects: they have thrown several river towns out into the rural districts, and built up sand bars and forests in front of them.

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徒步穿行于冰岛一个古老的熔岩荒野之中，你会发现一种奇怪的现象：眼前的土地正冒着热气！

Hike through one of Iceland's many ancient lava fields. You might notice something strange. The ground in front of you is steaming!

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