Every spring they shear off the sheep's wool and sell it.

每年春天他们都要剪下羊毛去卖。

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Gangs trying to tear it apart with hooks and chains lose control of their swoops when their engines malfunction or their control vanes shear off.

飞车党想用钩子和链条把它拆散，却发现飞行摩托失控了，不是引擎故障就是把手断裂。

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The progressive result is an accumulation of fatty deposits called plaque that can rupture or have their caps shear off, causing clots that lead to heart attacks.

Donohue博士说，进一步恶化的结果是称之为血斑的脂肪沉积开始积累、破裂、剥落，最后形成导致心脏病发作的血栓。

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Some of the bogies (the swivelling device which holds the wheels to the carriage) shear off and several coaches begin to tilt.

BBC: Hatfield: The accident in detail

The machinists in the engine cars must have been holding on for dear life, praying the support struts did not shear off.

NPR: Excerpt: 'Skybreaker'