The cavity pyroelectric detector is usually used as the work norm to calibrate relative spectral responsivity of detectors because of its flat spectral responsivity in broad spectra range.

由于腔体热释电探测器在宽光谱范围内具有相对平坦的光谱响应度，因此经常被用作标定探测器相对光谱响应度的工作基准。

youdao

In the historic centers of Kyoto and Kamakura, where 13th-century monuments are the norm, age becomes relative.

WSJ: Selling a Piece of Old Japan, to Save It

To keep the playing field level across the years, we rated all players on a relative basis, with their stats compared to the norm of the era.

FORBES: Ten Worthy Of Cooperstown

Unfortunately, the relative safety enjoyed by World Cup tourists was a striking deviation from the norm.

CENTERFORSECURITYPOLICY: Out of South Africa