Sentence examples similar to first class approximation from inspiring English sources

The first class of methods are the quantum chemistry methods, the simplest of which, the Hartree-Fock method, is too crude an approximation for most problems of interest.

First class!

Ah, first class.

Well, first class.

Sorry, I mean, First Class.

The first class was small.

It was first class.

He is first class".

"He has been first class.

"They fly first class now".

Best First Class Lounges. 1.