您要查找的是不是：
- Underwater vechiles 水下机器人
- This machine has been specially adapted for use underwater. 这机器是为水下使用而特别改装的。
- This machine has been specially adapted for underwater use. 这机器是为水下使用而特别改装的。
- A ship equipped for laying explosive underwater mines. 布雷舰艇装备有布水雷装置的舰艇
- A trademark used for an underwater breathing apparatus. 水肺，水中呼吸器用于水下呼吸装备的一种商标
- Travel Form is no longer useable underwater. 旅行形态不能再用于水下。
- A device used underwater to produce pulses of sound, as for an echo sounder. 声脉冲发送器置于水下产生声脉冲的装置，如回音器中的装置
- Riptide is a strong underwater current. 激潮是海面下一种强大的暗流，
- Yes, including the underwater form. 可以，包括在水下的形态。
- They extract ten million tons of coal each year from underwater mines. 他们每年从水下煤矿中采掘一千万吨煤。
- An underwater ridge or rock shelf. 暗礁水下隆起物或岩石架状物
- An underground or underwater passage. 地道，坑道地下的或水下的通道
- The diver was carrying out an underwater operation. 那个潜水员正在水下作业。
- The duck disappeared underwater. 鸭子潜入水中了.
- I found the silence underwater really eerie. 我发觉水下的寂静真令人恐怖。
- Robert Ballard is an underwater explorer. 罗伯特?柏拉德是一位水下探险家。
- It's three times as big underwater. 小下部分是水上部分的三倍。
- Go Hawaiian in this gorgeous underwater adventure! 来一次愉快的夏威夷水下探险吧!
- How long can you hold your breath underwater? 你可以在水下呆多久?
- They have to stay underwater all day long. 河马在阳光下时间长了就会脱水而死。
