keep sth on ice 留待以后用

keep on doing sth 继续作某事 ; 继续做某事 ; 持续做某事 ; 不停地做

Keep sth on track 保持正常进行

keep current on sth 随时了解

keep tabs on sth 密切注视

keep one's mind on sth 把注意力放在

I keep on doing sth 我一直在做某事

keep an eye on sth 密切注意

keep the lid on sth 保守秘密