接下来的几周里，一拨一拨的人想把巴尔斯路德带回瑞典但都无功而返，他们不得不又他隐蔽到洞穴中。

Over the next weeks, groups of men tried to drag him to Sweden but were driven back, and they had to shelter him again in holes in the ice.

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游牧民带着他们的家畜在崎岖的山岭地带跋山涉水，寻找牧场。他们整个夏天在山里的牧场，而冬天就转移到山谷中隐蔽的牧场去。

Nomads travel with their livestock and trek through the state's rugged mountain terrain to reach pastures where they spend the summer months in the mountains and the winter in the shelter of valleys.

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为了显示这种类型的错误是多么隐蔽，我已经在下面代码中引入一个错误。

Just to show how insidious bugs of this pattern can be, I've already introduced a bug in the following code.

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