vi.关于,有关,适合,附属,从属
I'm afraid that your remark does not pertain to the question.
恐怕你的话与这一问题不相干.
The imaginary elements pertain to a condition or state of a figure.
虚元素属于一个图形的某一种情形或状态.
His remark did not pertain to the question.
他的话同这个问题不相干.