例句與造句

1. The mechanical room consists of an environmental control and life support system, power equipment and avionics equipment and provides return airflow from Level One and Level Three through openings.
2. A "'plenum space "'is a part of a building that can facilitate air circulation for heating and air conditioning systems, by providing pathways for either heated / conditioned or return airflows, usually at greater than atmospheric pressure.
3. It's difficult to find return airflow in a sentence. 用return airflow造句挺難的