Because flotation cells are cascaded, interaction between the cells cannot be ignored, which cause some difficulties for the level control.

由于浮选槽是多个串联在一起的，相互之间的影响比较大，液位控制有一定困难。

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In English, negation can be realized by sentences with or without negative marks. Those sentences with no negative marks may cause some difficulties in being understood as well as translated.

英语的否定有明暗之分，暗含否定缺乏明显的否定标志，因而当它通过一些特定的句式来表现时，对它的理解与翻译就存在一定的难度。

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Studies suggest that experiencing a series of parents and parents' partners moving in and out of the household may cause difficulties like behavior problems in school for some children.

研究显示，经历一系列的父母和父母伴侣的变化，会导致一些孩子在学校里行为出现问题。

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Hussey built his innings more steadily, but both men were helped by Dhoni's decision to pull Harbhajan out of the attack just as he was beginning to cause Katich some difficulties.

BBC: Krejza raises Australia's spirits

If this could not be achieved, he told the same programme, the British public would have to consider whether they wanted to remain in the EU, adding that while withdrawal would cause "some difficulties" he believed they could be overcome.

BBC: 'Strong case' for EU referendum, says Hague

The relatively small size of the study means that some experts are likely to remain unconvinced that such apparently minor birth complications could cause such obvious difficulties later on.

BBC: Brain risk from birth oxygen shortage