To date, it has been unclear to what extent organic, carbon-containing material remains on lake bottoms, as opposed to being broken down.

迄今为止，还不清楚有多少含碳有机物未被分解存留在湖底。

youdao

Lake sediment nevertheless constitutes an important "carbon sink," serving to store - sometimes for a very long time - a significant portion of the carbon-containing material that does not decompose.

然而湖泊沉积物又是一个重要的“碳汇”，用来存储-有时存储很长的时间-相当大部分不能分解的含碳物质。

youdao

This paper introduces the wet process for extracting As 2o 3 from As containing material.

介绍了从含砷物料中湿法提砷的新工艺。

youdao

Stardust then returned to Earth and released a special reentry capsule containing the material it had collected.

VOA: special.2009.09.30

Where the show falls down is in the largest of the landscape galleries, flanked on two sides by alcoves containing background material.

WSJ: Vincent Van Gogh Up Close | Philadelphia Museum of Art | A Matter of Perspective | By Jonathan Lopez

It would, for example, make it easier to shut down websites containing pirated material, or to sue pirates in foreign countries for damages.

ECONOMIST: Regulating the Internet

It says the French workers who built the ship say it has 1, 250 tonnes of material containing asbestos.

BBC: NEWS | South Asia | Dhaka bans 'toxic' French liner