This glass is completely opaque.

The opacity of this glass helps to maintain the privacy of the room.

That translucent curtain lets soft light into the room.

I heard a groan from his room.

I could hear a groan of pain coming from his room.

My grandmother always wraps a cloth around her head.

The Jin era was a particularly important period in Chinese history.

Smoking is prohibited in this park.

Smoking is prohibited in this park.

My father is planning to start receiving his pension from next month.