mass是什么意思

用法例句

Therefore, It is vital sense that the research, mass survey and value evaluation of land vegetation s NPP , can more deeply learn the ecological process and ecological function of the ecosystem.

因此 ,陆地植被 NPP物质量与价值量的测评研究 ,对于更好地认识生态系统的生态过程与生态功能具有重要的意义。

Integrative judgment with fuzzy decision method in the fabric quality;

织物质量的模糊综合评判

The chemical composition,metallographic structures and mechanical performance,micro-nonmetallic inclusions and center carbon segregation of billets in advanced high carbon steel produced from several steel company at home and abroad were analysed and compared it can be as reference to improve the quality of high carbon steel.

分析对比了国内外钢厂生产的高级硬线钢的化学成分、金相组织和力学性能、显微氧化物夹杂、小方坯中心碳偏析,为改善高碳钢实物质量提供依据。

On account of this, this paper identifies evaluative factors with bio-quality and environment influences of plantation and presents the content, indicators and methods of plantation bio-quality.

通过对人工林工程生物质量评价因子与环境影响评价因子的判别,提出了人工林工程生物质量评价的内容、指标和方法;针对人工林工程的环境影响,论述了地力维持、水源涵养、生物多样性保护以及社会环境影响等评价内容。