debunk
v[Tn]
show that the reputation of (a person, an idea, an institution, etc) is undeserved or exaggerated 揭穿(某人、 某思想、 某机构等)名不副实
debunk fashionable opinions 指出流行一时的说法的不是.
After switching on powerful arc lights, they saw great stalagmites -- some of them over forty feet high -- rising up like tree-trunks to meet the stalactites suspended from the roof.