1、保守秘密
... keep secrets to oneself 暗自保守秘密 keep something to oneself 保守秘密 ; 对某事保密 ; 对 Keep it to oneself 保守秘密 ...
2、对某事保密
... keep secrets to oneself 暗自保守秘密 keep something to oneself 保守秘密 ; 对某事保密 ; 对 Keep it to oneself 保守秘密 ...
3、对
... keep an eye on 照看, 密切注视 keep something to oneself 对...秘而不宣 keep tabs on 密切注意 ...