It causes some sleepless nights. Some change is going to have to happen.

Somebody who lives next door, who stands up for a cause, who do something that causes a change with their neighbors.

The change in shape of the propeller part of the motor during the rotary process causes a change in organization of the molecules of the liquid crystal material and a rotary change in the surface profile. An object placed on top of the surface follows the change in surface profile, which leads to rotary motion. A comparison is a small boat floating on rotating waves.

We can do a lot with change drives, too. In some causes it is better because we can buy things at a discount and without tax.

When it is not necessary to change, it is necessary not to change.

When we have to change our minds about a person, we hold the inconvenience he causes us very much against him.