I try my best.
This is a wonderful example for the many literal translations from Chinese into English.
小心 xiao3xin1 pay attention to, beware of (but can also be used as an imperative "Be careful")
滑 hua2 slip
倒 dao3 fall, slide
Since 滑倒 is used here to explain basically the same, that is slipping and/or sliding (in any case, some movement that will eventually hurt a lot), it really is suffice to say "Caution: slippery floor".