应用最广的是线性、时不变数字滤波器，以及IIR和FIR滤波器。

The most widely used is linear, time-invariant digital filters, and IIR and FIR filters.

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虽然每年录取的本科生人数已经保持不变数年之久，斯坦福像他同一级别的其他学校一样，每年会收到超过42000份申请。

While the number admitted into the undergraduate class has remained unchanged for years, Stanford, like many of its peer schools, has had a record number of total applicants - more than 42,000.

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两种表面热处理液体渗氮及渗硫工艺与现行生产上原采用之液体渗炭淬火处理工艺，在尽量保持其他可变数不变的情状下加以比较。

Two surface heat-treatment processes, liquid nitriding and sulfurizing, are used to compare with the current production process of liquid carburizing, with other variables remaining constant.

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