吹大气球，然后把气球口放开一点点，放出空气。
Blow up balloons and then slowly let out the air by narrowing the opening of the balloons.
如果你使用了我们的可充气自行车，你可以非常简单地放出空气，把你的自行车放进书包里。
If you use our inflatable bike, you can simply let the air out and put your bike in a bag.
一群白鲸在加拿大马尼托巴的哈得逊湾潜水觅食。离摄影师最近的一只白鲸正放出空气以助下潜。
A pod of beluga whales diving to feed in Hudson Bay, Manitoba, Canada. The whale nearest to the photographer is releasing air to aid its descent.
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