We found that operation risks and bankrupt costs of enterprises could have positive impacts on leverage ratio, while pay-out ratio of dividends may have negative impact on leverage ratio.

我们发现企业的经营风险和破产成本可能对杠杆率有正面影响，而股息支付率则与杠杆率负相关。

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The technology operation optimization was carried out, the feasible ways of retaining filter long period smooth running were found out.

对工艺操作进行了优化，找出了维持过滤机长周期平稳运行的可行性方法。

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I once read a letter written by a young invalid, in which he told a friend that he had just found out he would not live for long, that even an operation would be of no help.

有次，我读到一封由某个半身不遂的年轻人写给他朋友的信。信上说，他才刚获悉自己将不久于人世，即使动手术也终归徒劳。

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Tonsillectomy - cutting out the two lumps of lymphoid tissue found at either side of the back of the throat - is an operation that was described first over 3, 000 years ago.

BBC: UK 'doing too few tonsil operations'