invert
vt.使倒转，使倒置，使颠倒
investment
n.投资，投资额;(时间、精力等的)投入
Foreign investment in Thailand rose by 79% last year.去年在泰国的外国投资上升了 79%。
invisible
a.看不见的，无形的
The house was surrounded by trees and invisible from the road.这所房子树木环绕，从路上是看不见的。
municipal
a.市的，市政的
the municipal waste dump城市垃圾场
