The little one was built especially for you, so that you can leave your children under the supervision of two well-trained lifeguards.

supervision 是由动词 supervise（监督）加上名词后缀 -ion 构成的名词形式。supervise 本身由前缀 super-（表示"在上方"）和词根 vise（来自拉丁语 videre，意为"看"）组成，字面意思是"从上方看护"，引申为"监督、看管"。 supervision 指"监督、看管"的行为或状态，强调专业人员对儿童或特定人群的照看职责。