说不定他无法鉴别水底的反射信号.Maybe he can't screen out bottom return.汤川子挣扎着试图摆脱将它困在水底的冰冻.The Yukon was straining to break loose the ice that bound it down.他沿着湖边走着, 嗥叫着,水底的黄金闪烁着光芒.He walks alone round the lake where the yellow go...

“水底的”的英语可以翻译为：submarine ...