1、A stalagmite is below a stalactite and they both grow, eventually to meet.
石筍在鐘乳石下面，它們二者都在增長，最終會(huì)合。

2、“What are those stalagmite projections sticking up?
“那些筆直豎立的石筍狀凸出物是什么東西？”

3、Once a stalactite and a stalagmite are connected, then it is called a column.
當(dāng)鐘乳石與石筍連在一起，稱之為圓柱。

stalagmite翻譯