In the late autumn period, it may be more difficult to rule out late - moulting Vega Gulls if we are to use "white heads" as our main method of separating the two.

在秋季后期，我们如果主要是利用头部全白与否来分辨这两种，那就很难排除那些换羽较迟的织女银鸥个体。

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Henry VIII (rule 1509-1547 A.D.) : England prospered in the 16th century, and as a result, it became increasingly difficult to tell the merchants from the middle class from the nobility.

亨利八世(1509年至1547年在位)：16世纪的英国经济繁荣，这使得来自中产阶级的商人和上层阶级的贵族从外貌上难以区分。

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Rule of thumb is... If you find that a person is super picky, very opinionated, unprofessional, or difficult to work with up front….

当你发现一个人超级挑剔、偏执、不专业，很难再和他一起工作的时候。

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India had become steadily more difficult for Britain to rule and without India, British hegemony in the Middle East, deemed a core national interest until the disaster of Suez in 1956, was increasingly unsustainable.

ECONOMIST: The British empire: Pondering the past | The

And private equity would find it much more difficult to function without the rule that allows interest to be tax-deductible.

ECONOMIST: The unintended consequences of past financial reforms

But it is also an example of how difficult Peru finds it to establish the rule of law even in minor matters.

ECONOMIST: A small battle for the rule of law