And they found that the protective covering is actually only 6 nanometers thick. That's about a fifteen-thousandth as thick as a sheet of paper.

他们发现，保护敷层实际上只有6纳米厚，大概是一张纸的千分之十五的厚度。

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A software based frequency tracking algorithm for protective relaying is analyzed thoroughly. in this paper, the availability of this algorithm under the non-noise condition is proved.

全面分析了一种保护用软件频率跟踪算法的性能，论证了在无噪声干扰的情况下该算法的有效性。

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In this paper, a new technique of protective layer excavation of horizontal foundation was expounded and applied to the construction of Lijiaxia hydropower station.

本文是水平建基面保护层一次爆破开挖新技术在李家峡水电站工程的应用实例。

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The paper suggested that a diet rich in fruit and vegetables may be helpful because of the protective effects of antioxidants and vitamin C.

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