The goal is to discover how the system behaves under sustained use.

Even today, the municipal area is under agricultural use.

Under very heavy use, we know that film strips do wear out.

The center suffered from under use leading to financial management difficulties.

Most of the lands is under use for cultivation and pasture.

When the machine is under heavy use, the teeth may need to be replaced frequently, even daily.

Some argue that fan fiction does not fall under fair use.

The problem was that they could start to untie all by themselves under heavy use.

They were designed not to fail under normal use and, in practice, rarely did.

Under heavy use, seven hours of battery life is achievable.