milestone學測 L5KK [ˈmaɪˌlston] ｜ /ˈmaɪˌlstoʊn/
路標石；里程標示石·重要的里程碑；重大進展
學測常考字，比喻人生重要階段
Passing the driving test was a milestone that made her feel truly grown up.
通過駕照考試是一個里程碑，讓她真正感覺長大了。
一個畫面：立石標記距離
路邊石樁沿路豎立的石頭，標出走到哪裡
回頭望里程回頭看走過的距離，標出一段進度
重要的一步完成旅程或計畫中的關鍵一段
義項
路邊石樁C2noun路標石；里程標示石
As we drove along the road, we saw a milestone showing the town was fifty miles away.
我們沿路開車時，看到一塊里程碑顯示小鎮還有五十英里遠。
pass a milestone
人生階段C1noun重要的里程碑；重大進展
Graduating from college was a major milestone in her life.
大學畢業是她人生中的一個重大里程碑。
a major milestonereach a milestone
片語
a major milestone重大進展 →生命中重大的里程碑
reach a milestone達成目標 →達成一個重要階段
pass a milestone經過石樁 →行經路邊的里程碑石
你會不會這樣說？
Graduating from college was a major ___ in her life. (milestone / millstone)
看答案
milestone
milestone 指重要階段，millstone 指磨石，形近義不同。
'We drove along the road and saw a milestone showing the town was fifty miles away.' 這裡的 milestone 最接近哪個意思？(A) 人生重要階段 (B) 路邊里程標示石
看答案
(B)
此句描述開車經過路邊石頭標示距離，對應「路標石」義項，而非人生重要階段。