这种结实的高强度塑料盒子在水下100英尺以内是防水的。The durable high-impact plastic case is water resistant to 100 feet.鳄鱼把它的捕获物按在水下淹死.The crocodile killed its prey by keeping it under and drowning it.汽车沉在水下20英尺处.The car was submerged under 20 f...