keep track of还是keep trace of?

keep track of还是keep trace of? I keep track of the keep up the track of keep track keep track keep track keep track keep track of 最好有例句说明 keep track with是什么意思 keep track of 后面接什么填词！do you understand? Computers keep track of goods in stock ,of raw materials .第二个of能不能省略 set down 和 keep track of 用法的区别set down 和 keep track of 都有记录记下的意思 那具体有什么区别呢? keep your goal on track中文意思 keep silent还是keep silence keep health还是keep healthy keep diaries还是keep diary keep happily 还是keep happy keep