Goniophotometer
测角光度计
🗣️ 情景例句
She is a terrible student.
她是一个极糟的学生。
In college I majored in math, What was your major?
大学时我主修数学，你主修什么呢？
The clouds had come down so suddenly we had no warning.
乌云突然出现，我们丝毫没有觉察。