He was charged with kidnapping the child and setting a fire to cover her tracks.
他被控綁架這名小孩以及放火湮滅她的行蹤。
2.get back on track 回歸正常
After anti-Japanese protests in China, how can relations between the two powers get back on track?
中國發生反日示威之後，兩大強國的關係如何回歸正常？
3.keep track of sth 保存…資料
Large organizations use this software to keep track of personnel, clients and inventory.
大公司機構用這種軟體保存人事、客戶和庫存資料。
4.lose track of 數不清
He says he lost track of how many lives he took during his 10-year criminal career.
他說他數不清他十年犯罪生涯中到底奪走多少人命。
5.on the right track (idiom) 走對方向
Only 37% of Americans believe the country is on the right track.
只有百分之三十七的美國人相信美國走對方向。
