多喝水有助于保持膀胱健康。

Drinking plenty of water helps keep your ___bladder healthy.

水上运动使用的充气囊需要定期检查是否漏气。

The ___bladders used in water sports need regular checks for leaks.

这种水生植物的茎上有许多小气囊，帮助它漂浮在水面上。

The stems of this aquatic plant have tiny ___bladders filled with air to keep it afloat.