1) utilized years
利用年限
1.
Comparison of microbial biomass and enzyme activities in paddy soils with different utilized years in Cixi,Zhejiang Province;
浙江慈溪不同利用年限水稻土微生物生物量与酶活性比较
2) utilization years
利用年限
1.
Effects of utilization years on soil physical properties in the agro-pastoral transitional zone after cropland’s being transformed into grassland;
利用年限对农牧交错带退耕还草地土壤物理性质的影响
3) Utilization period of seed
种子利用年限
4) absolute period of livestock use
家畜绝对利用年限
5) patent length
专利年限
1.
Taking account of the spill over effects of R&D,we build up a game model to discribe the relationship between R&D and market structure with the help of patent length,and get two basic conclusions:investments in R&D can be further stimulated through more competition;incentives from government is necessary.
由于Ｒ＆Ｄ的溢出效应，本文引入专利年限，建立市场结构和Ｒ＆Ｄ的互动关系模型，得到Ｒ＆Ｄ和市场竞争度正相关；需要有来自政府的激励。
2.
The Optimization of Patent Length and Patent Breadth;
通过专利制度对技术创新的激励效能和垄断的社会成本之权衡，本文指出，适当延长专利年限从社会福利的角度而言是可取的；而在序贯创新中，延长专利年限是必要的，本文还优化确定了序贯创新中的专利宽度。
6) utility duration
效用年限
补充资料：年限
1.规定的或作为一般标准的年数。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条