Typical absolute standards include two types: absolute standard detector and absolute standard light source.

常用的绝对标准有两类：绝对标准探测器和绝对标准光源。

youdao

Typical absolute standards include two types: absolute standard detector and absolute standard light source.

常用的绝对标准有两类：绝对标准探测器和绝对标准光源。

youdao