年轻蘑菇的菌褶上覆盖着一层薄薄的蛛网状菌幕。

The young mushroom had a thin, cobweb-like ___cortina covering its gills.

红色幕布缓缓升起，露出舞台上的芭蕾舞者。

The red ___curtain slowly lifted, revealing the ballet dancers on stage.