suction air

例句：

1. 1. The ventilation system is designed to ensure that the suction air is clean and fresh.
   通风系统的设计是为了确保吸入的空气是清洁和新鲜的。
2. 2.During the operation, the patient's suction air was being monitored closely.
   在操作过程中，患者的吸入空气被密切监控。
3. 3. The engineers were instructed to check the suction air pressure regularly.
   工程师们被指示定期检查吸入空气的压力。