里程碑
里程碑係棟響路邊一串數字嘜。通常每隔一段路就放一個，話畀路人知去到邊，或者目的地有幾遠。以前里程碑會棟一支石碑，家下好多時係一塊金屬板。馬路、山路、鐵路都可能會有里程碑。
里程碑數字可以係寫低同起點終點有幾遠，有時重會有分數。
引申
平時話一樣嘢或一件事業到達一個里程碑，意思係呢嘢或呢件事業有啲見得人嘅成果，甚或入咗新嘅階段。
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