用作定语
▲～+n.
The glass was filled with an opaque liquid.玻璃杯里装满了一种不透明的液体。
The opaque part gives prominence to the surroundings of the picture.这幅画阴暗的部分突出了周围的部分。
The report was written in long, opaque sentences.报告中的句子又长又难懂。
用作表语
▲S+be+～
A brick wall is opaque.砖墙是不透光的。
The once clear mountain stream is now polluted and opaque.曾经是很清澈的山溪,现在受到污染变得混浊了。
His report was deliberately opaque.他的报告故意含糊其辞。
His words were quite opaque.他的话很晦涩难懂。
▲S+be+～+prep.-phrase
Lead is opaque to X-rays.铅阻挡X射线透过。
The old show windows are opaque with dirt.旧的橱窗由于肮脏而不透光。

［同义词］   cloudy, difficult, dim
［反义词］   bright, clear, sparkling, transparent
［词源］＜中古英语opake(遮光的,不透明的)