在长跑训练中，每隔30分钟我们就会短暂休息一下。

During the long-distance training, we take short ___breathers every 30 minutes.

在紧张的复习期间，他偶尔会休息几分钟喘口气。

During intense study sessions, he takes short ___breathers every now and then.

潜水员们在下水前检查了他们的呼吸器。

The underwater team tested their ___breathers before the expedition.