He can speak African American Vernacular English fluently.

They are quarreling every day.

I had a big quarrel with him yesterday.

He decided his own course.

His meritorious service is very significant to us.

This public road has a lot of traffic.

My luggage is too heavy, can someone help me carry it?

In mathematics, an axiom is not a fact to be proven, but a basic premise that is considered self-evident.

He is struggling to repay the high-interest loan.

The axiom of choice is one of the important axioms that form the foundation of mathematics.