The paper workers should have basic knowledge such as the suitable selection of felt species, strengthen the maintenance and upkeep of felt, lead operational control for felt.

选择适合抄纸工艺的造纸用毛毯、加强毛毯的维护与保养，做好毛毯运行的监控，对造纸工作者来说，是应该具备的基本知识。

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Several kinds of typical methods of maintenance microalgae species are presented, including succeeding preservation, immobilization storage and cryopreservation.

本文介绍了微藻保种的几种常用方法，包括继代保存、固定化保存和超低温保存。

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Conclusions The maintenance time of immune deviation varied with different species of animals and different intraocular compartment.

结论不同种系动物和不同眼内腔免疫偏离的维持时间不同。

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Overall, each of the six ecosystem processes examined which included the maintenance of stability and improved water quality worked better when there were more species than when there were fewer.

ECONOMIST: Marine biodiversity

Biodiversity, which includes species, ecosystems, and ecological processes, is essential for the long-term maintenance of ecosystem services like photosynthesis, nutrient recycling, soil fertility, provision of fresh water, disaster prevention, and many others.

FORBES: Conservation International: Stemming the Tide of Environmental Crises, Part Five