His frankness provided us all with a new perspective.

He always expresses his opinion frankly.

The phone rang immediately after he left the room.

This building is built completely vertical.

This electrical appliance requires a direct current power supply.

This train goes direct to Tokyo Station.

He pointed out the problem point-blank.

Time flies like an arrow, a year passed in the blink of an eye.

There are times when we perform calculations with the haversine in trigonometry.

I learned how to calculate the hacoversine in trigonometry.