文章对我国环境保护系统研制出用于海洋和江河水域环境监测的牡蛎生物环境标准样品的一些情况做了详细介绍；
This paper described in detail the oyster biology and environment reference material used in environment monitoring of ocean and rivers and prepared by environment protection system.
几十年来，危言环境保护主义者一直警告说人类的厄运迫在眉睫，主要由于我们对于地球上自然环境系统的利用不可持续，且对其造成严重影响。
For decades, apocalyptic environmentalists (and others) have warned of humanity's imminent doom, largely as a result of our unsustainable use of and impact upon the natural systems of the planet.
该产品为封装音圈调节器，与半封装产品类似，但是配有外壳和连接器，更有利于一些机械和环境保护，更加方便系统集成的易用性。
Housed VCA same as Semi-Housed but with enclosure and connector for some mechanical and environmental protection and for ease of use in system integration.
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