adj.不透明的；難懂的
The window is made of opaque glass. 這扇窗是用不透明的玻璃做的。
The report was written in long, opaque sentences. 報(bào)告中的句子又長又難懂。
Their intentions remained opaque. 他們的意圖仍然令人費(fèi)解。
n.不透明性；蔽光性
