lose track of

adj. 失去 ... 的线索

例句与用法：

Mary lost track of her friends at camp after summer was over.

夏天过后，玛丽就和她一起宿营的朋友失去了联系。

The farmer has so many chickens, he can often lose track of them all.

这农民有许许多多小鸡，弄得他常常自己也数不清。

详细释义：

失去……的线索

The police has lost track of the criminals.

警方已失去追踪罪犯的线索。