Once again, as in "At the Hands of Persons Unknown", his account of the lynching of blacks by whites in the American South, Mr Dray is angered by injustice.

德雷经常为社会的不公平现象而义愤填膺，在“看不见的手”一文中，德雷再次对美国南部的白人对黑人处以私刑表达了愤慨之情。

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She stood doggedly in checkout lines she toiled like a dray horse up the Hill back home.

她顽强地支撑着排在付款的队里；她像拖载重物的老马艰难地爬上山回家。

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The sparrow upon the wire, the cat in the doorway, the dray horse tug ging his weary load, feel the long, keen breaths of winter.

电线上的麻雀，门口的猫，负重的瘦马，都感觉到了漫长严冬的气息。

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And your lieutenants are sometimes like dray horses pulling in opposing directions.

FORBES: How to Stop Reacting and Start Leading

As a consequence, in Mr Dray's view, unions have lost their reformist zeal.

ECONOMIST: The epic story of labour in America

In Mr Dray's view it has become a conservative, even reactionary, force that struggles to safeguard jobs, wages and benefits, not to improve them.

ECONOMIST: The epic story of labour in America