We can now understand the distinction between physics and psychology.

In fact, she hardly understood the distinction between male and female.

I need to be sure that you understand the distinction.

It is important to understand the distinction between the address and the contents of a memory location.

I should think you would have learned to understand the distinction.

That makes perfect sense to me, as long as you understand the distinction.

There was no need to point out the difference between threatening and doing; she understood the distinction.

I understand the logical distinction you are trying to impart.

Captain, but I must be certain that you understand the distinction.

But various studies show that most bank customers do not understand the distinction.