The conventional method of testing the shed drawing deformation of travellers is of poor precision and difficult operation.

目前纺纱用钢丝圈开口拉伸变形率的测量采用人工方法，精度低，操作困难。

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After the operation you may find it difficult to chew and swallow.

手术后你咀嚼和吞咽都会感到困难。

《牛津词典》

However, as the complexity of the operation grows, this kind of code can get complicated and difficult to maintain.

不过，随着操作变得越来越复杂，这类代码也会变得很复杂很难维护。

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"We are grateful for the patients' and public's understanding and co-operation during what can be a difficult and stressful situation, " she added.

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The change in military strategy was described by British officials as a "difficult and high risk" operation.

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Strong winds and high seas made search conditions difficult and by Thursday afternoon Dutch coastguard spokesman Peter Westenberg said the operation had stopped.

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