We saw many underwater animals at the aquarium.
我們在水族館看到許多水下的動物。
The divers took photos with an underwater camera.
潛水員用水下相機拍照。
The park has an underwater tunnel to watch fish.
這座公園有水下隧道可以看魚。
Our science class built a small underwater robot.
我們的自然課做了一個小型水下機器人。