孔隙率，面密度，厚度，流阻，结构因数因素综合影响其吸声系数。

Porosity, surface density, thickness, flow resistance, structure factor and other factors affect the sound absorption coefficient.

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本文采用投影算子方法统一处理了一维扭析声子耦合气体的动力结构因数。

In this paper, we treat the dynamical form factor of one-dimensional kink-phonon gas as a whole by projection operator technique.

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您可能见到过大整数质因数分解，或是对复杂数据结构的庞大列表进行分类，这些都是长时间运行的操作。

You might see examples of prime factorizations of large integers, or sorting huge lists of complex data structures, and those are certainly long running operations.

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