“潜入水中”常见的英文表达是 “dive into the water” 或 “submerge in water” 。
dive into the water 侧重于描述主动、快速地潜入水中的动作,例如:He dived into the water to save the drowning child.(他潜入水中去救那个溺水的孩子。)
submerge in water 更强调完全没入水中的状态 ,例如:The submarine will submerge in water when it reaches the designated depth.(潜艇到达指定深度后会潜入水中 。)