My new computer is very fast.

In psychology, it is important to understand the mechanism behind human behavior.

I can't afford to miss this opportunity.

The transmission of this car is very smooth.

He solved complex mathematical problems using his new calculator.

The traffic light turned red, so I stopped.

He is fulfilling his responsibility as a president who controls state affairs.

Excuse me, may I come in?

I bought a new dishwasher.

Please look at my new camera.