stalagmite造句

1、A stalagmite is below a stalactite and they both grow, eventually to meet.
石笋在钟乳石下面，它们二者都在增长，最终会合。

2、“What are those stalagmite projections sticking up?
“那些笔直竖立的石笋状凸出物是什么东西？”

3、Once a stalactite and a stalagmite are connected, then it is called a column.
当钟乳石与石笋连在一起，称之为圆柱。