这种玻璃的高不透明度确保了室内的私密性。

The high ___opacity of this glass ensures privacy indoors.

这份合同的晦涩难懂让许多客户感到困惑。

The ___opacity of the contract confused many clients.

将图层的不透明度调低，这样背景就能透过来。

Lower the ___opacity of the layer so the background can show through.