The hydraulic support, which performs well after the transformation, plays an active role in the safety in underground production.

改造后的液压支架性能良好，效果显著，为井下安全生产起到了积极的作用。

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Living underground can depress production of the chemicals that help dilate and contract the pupil in response to changes in light.

由于长期处于地下，作为对光照减少的反应，帮助瞳孔扩张和收缩的化学物质的产生会相应减少。

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Underground pipeline is a kind of important basic establishment of modern production and living, it takes on some important basic work, such as information and energy transmission.

地下管线是现代生产和生活中的一个重要的基础设施，担负着信息传输、能源输送等基础工作。

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The current phase of production at the Ekati Diamond Mine includes ore sourced primarily from the lower grade, but high carat value, Fox open pit supplemented by underground production from the lower portion of the Koala kimberlite pipe and from the Koala North pipe.

FORBES: Harry Winston to Purchase Ekati Diamond Mine For $500 Million

Freeport has been ramping up operations at its underground mines amid declining surface production.

WSJ: Indonesian Mine Death Toll Rises, Miners Still Trapped

It also examines a range of subjects, including population growth, climate change, altered ecosystems, food production, health, industry and energy, as well as biofuels and the importance of underground aquifers.

UNESCO: MEDIA SERVICES