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来自拉丁语opacus,有阴影的，黑暗的，模糊的。

1. The jargon in his talk was opaque to me.

他谈话中使用的行话对我是一团迷雾。

2. 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.

3. The complex administrative arrangements render the decision - making process somewhat opaque.

复杂的行政协商使决策过程透明度不高.

4. The report was written in long, opaque sentences.

报告中的句子又长又难懂.

5. You can always use opaque glass if you need to block a street view.

如果不想从室内看到街景，可以使用不透明玻璃。