This software is shareware, so you need to pay a fee after the trial period.

Software engineering is a field of study related to the design and development of computer programs.

The incubation period of the new coronavirus is on average 5 to 6 days.

The grace period for your loan is until next month.

I bought new leisurewear.

This freeware is very convenient, and anyone can download it for free.

I bought new underwear.

He is an expert in embryology, studying the developmental processes of many kinds of organisms.

The process of embryogenesis is very complex, with continuous cell division and differentiation.

This free software can be used, modified, and redistributed by anyone freely.