尽管道德风险令保险成本更为高昂，也降低了保险的效率，但许多保险市场运转地足够有效。

While moral hazard makes insurance more expensive and less efficient, many insurance markets work well enough to be useful.

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减速机的承载能力增大，效率提高，噪声降低，运转平稳。

And this speed reducer possesses big bearing capacity, high efficiency, low noise and smooth running.

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然而， 太阳跟踪器的安装和运转都很昂贵，并且很容易造成过度加热电池，这足以降低它们的效率，甚至会造成毁损。

Such trackers, however, are expensive to install and run, and are prone to heat the cells up too much, which reduces their efficiency and may damage them.

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