His plane was lost track of about two hours out from London Airport. 他的飛機飛出倫敦機場(chǎng)已約有兩個(gè)小時(shí)沒(méi)有音信了。
It's hard to keep track of all one's old school friends. I have lost track of some of mine already. 很難保持與所有老同學(xué)的聯(lián)系,我已失去與一些老同學(xué)的聯(lián)系了。