堆肥主要由植物物质组成。

Compost is primarily composed of vegetable ___matter.

图书馆收藏有19世纪的印刷品。

The library has a collection of printed ___matter from the 19th century.

阅读印刷品比从屏幕阅读对眼睛的疲劳更小。

Reading printed ___matter causes less eye strain than reading from a screen.