"Since I appointed a new department head, business has certainly improved." the boss smiled." The new fellow keeps an eagle eye on all aspects of our operations. He watches the staff with an eagle eye, too." Someone with an eagle eye watches things closely and carefully. Nothing escapes his attention.

“自從我任命了一個(gè)新的部門(mén)主任后，公司業(yè)績(jī)大幅提高，”老板得意地說(shuō)“這個(gè)新人對(duì)公司的各項(xiàng)工作都認(rèn)真負(fù)責(zé)，對(duì)員工的督促監(jiān)管也很嚴(yán)厲，眼睛像鷹般敏銳。”

鷹(eagle)有極佳的眼力，縱然盤(pán)旋于高空上，也能看見(jiàn)地下細(xì)小的獵物，于是給了我們"an eagle eye"這個(gè)用語(yǔ)，比喻某人有銳利的目光。