This product is of poor quality and not worth the price.

His language was vulgar and unpleasant, unbearable to listen to.

The door opens.

Sexual abuse is an act that is absolutely not allowed.

The lens of this camera is easy to attach and remove.

He is living a life of shabby clothes and plain food.

He is living a life of shabby clothes and plain food.

The train was full.

I was very moved by his sincerity.

Reverse Polish notation is one method of expressing calculations.