Filter-free design, long lamp life, and inexpensive lamp replacements make it easy to maintain.

无滤波器的设计，灯泡寿命长，成本低廉的更换灯泡更容易维护。

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By inspection, when the first measurement is noise free, the filter ignores the second measurement and vice versa.

通过检查，当第一个测量值是无噪声的，那么该滤波器就忽略了第二个测量值，反之亦然。

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A novel model based on free node spline function is put forward to improve the design of the polynomial least square filter.

提出了利用自由节点样条函数来改善多项式最小二乘滤波器设计的模型和方法。

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Soon, you will also be able to filter by growing practices, like antibiotic-free.

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Some scientists, giving their imaginations free rein (and extrapolating from Earth's own sea creatures), have suggested filter-feeders, such as whales.

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