1) effective limit of years
有效年限
1.
The effective limit of years of seed vitality of trees was obtained through examination of many years;the relationship of water content, environmental temperature and sealed storage with seed storage life-span was s.
经多年试验观测 ,得出各树种种子保持生活力的有效年限 ;总结出种子含水量、环境温度、密封贮藏与种子贮藏寿命的关系。
2) Efficient time to prevent sediment
有效拦沙年限
3) utility duration
效用年限
4) limited annuity
有限年金
5) effectiveness time limit
有效时限
1.
Observation on effectiveness time limit of alcohol to disinfect therm ometer by continuous soaking;
[目的 ]观察 75 %乙醇持续浸泡体温计的消毒效果及有效时限。
6) limited effect
有限效力
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