但是，美国垦务局不同意大坝只有50年使用期的说法。
But the U.S. Bureau of Reclamation disagrees that 50 years is an advanced age for a dam.
30天使用期后，用户必须付费观看菜谱视频，但文本菜谱仍是免费的。
After 30 days users must pay to access video recipes, but text recipes remain free.
传统的经杀虫剂处理的蚊帐需要经常进行再处理，而长效杀虫蚊帐则在蚊帐的整个使用期都有效，无须进行再处理。
Conventional insecticide treated mosquito nets need to be re-treated regularly, while long-lasting insecticidal nets (LLINs) are designed to be effective without re-treatment for the life of the net.
“有效使用期”或“最好于该日期前使用”表示的是该产品在这个日期前，从口感、质地、外观、气味和营养价值等各方面保质着最佳质量，过期之后质量就会逐渐下降。
The “use-by” or “best if used-by” date indicates the last day that the item is at its best quality as far as taste, texture, appearance, odor, and nutritional value. The decline after that is gradual.
我们确定销售中的产品在其使用期之内。
Rest assured the items we are selling are well within their use dates.
此外应加强使用期监测，必要时及时维护。
Additionally, the monitoring shall be strengthened in using stage, and maintenance shall be carried out promptly if necessary.
土地使用期到期展延时，应服从其时有效的城市规划。
When the Land Use Term is due for renewal, the then effective urban planning must be complied with.
结果表明，经过大修改造的漏斗车可延长有效使用期。
The result shows that the effective service life of the overhauled and reformed hopper car can be prolonged.
在减少能量要求的同时，还可以延长驱动系统的使用期。
As well as cutting energy requirements this also extends the life time of the drive system.
免费柜期：货柜自到达目的港日起给予14天的免费使用期。
Container's schedule time for free: from the tanks arrival at destination have 14 days for free.
美国癌症协会建议说，如果使用激素，使用期要限制在五年以下。
If you need to take hormones, limit your use to less than five years, the ACS advises.
侯爽，钢筋混凝土结构预期使用期可靠度设计与FRP加固监测。
RC Structure Reliability Design for Expected Service Life and Its FRP Strengthening and Monitoring.
标签上警告使用者每天用量不要超过八片，而且使用期不要超过两天。
The label warns users not to take more than eight tablets per day and not to use the medication for more than 48 hours.
如果在建议的温度下保管，可以一直用到包装上印制的“最佳使用期”。
If stored in the recommended temperature range, the Activator Solution can be used through the "Best if used by" date printed on the back of the kit.
境外放款额度有效使用期为自获得外汇局核准境外放款额度之日起2年。
The term of validity of the overseas loan limit shall be two years from the date when the lender obtains the approval of the overseas loan limit from the foreign exchange bureau.
得出基于后续使用期主车和重车荷载最大值分布的0.95分位值作为桥梁评估荷载。
The 0.95 fractiles of the maximum distributions of both overloaded trucks and normal vehicles are proposed as the evaluation loads of highway Bridges.
本文给出了一种途径，使建筑物使用期规划和基于绩效的建筑这两个概念联系起来了。
A path for the connection of the established concepts of service life planning and performance-based building is presented.
但是随着柴油机使用期的增长，启喷压力会逐渐降低，导致燃烧过程恶化，经济性下降。
But the fuel starting injection pressure will turn low gradually when the operational time of the diesel engine increases. This will cause worsening of the combustion process and fuel economy.
文章提出了“无故障使用期”的理论模型并分析了其替代“保修期”承诺可能产生的正效应。
This paper has offered a theoretical model on Non-Failure Time and analyzed its possible positive effects after replacing Guarantee Period.
混凝土是土木工程中应用最广泛的结构材料，重大工程结构的使用期长达几十年、甚至上百年。
Concrete is one of popular engineering structural materials. Some momentous concrete structures must be used for decades even hundreds years.
设备预防维修期与更新期的确定，能使设备在使用期中，投入最佳的维修费用，发挥它的最大效用。
The determination of the preventive maintenance period and replacement period makes it possible to maximize the equipment efficiency with minimum maintenance expences during its usage life.
结构在施工期的平均风险远远高于使用期，开展大跨度斜拉桥施工期间的风险分析研究是十分必要的。
The average risk of structure in construction period is far higher than one in use period. To make the risk analysis study is very necessary in the construction of large-span cable-stayed bridge.
有了荷载基准期，即可估计结构在继续使用期间最大荷载的概率分布，进而对服役结构的可靠性作出评价。
With the load datum time, maximum loads probability distribution can be estimated during the structure in service, thereby we can assess reliability of structure in service.
有了荷载基准期，即可估计结构在继续使用期间最大荷载的概率分布，进而对服役结构的可靠性作出评价。
With the load datum time, maximum load's probability distribution can be estimated during the structure in service, thereby we can assess reliability of structure in service.
提出了刀具全生命周期管理的概念，将刀具全寿命周期管理划分为计划期、投入期、使用期、报废期四个阶段。
The concept of cutting tool life-cycle management was put forward, and divided it into four phases: planning period, input time, serviceable life and discarding period.
使用期刊引证报告（JCR）6015种期刊数据，以统计学方法探索性地分析5年期影响因子IF5的特点。
Based on the data of 6015 journals collected in the Journal Citation Reports (JCR), the author investigates the characteristics of 5-Year Impact Factor (IF5) with the method of statistical study.
该聚合物与环氧树脂形成的涂膜兼具酚醛树脂型和环氧树脂型涂膜的优异性能，耐酸、碱和有机溶剂，而且使用期较长。
The films remain properties of both cardanol-formaldehyde resin and epoxy resin , which are acid-resisting , alkali-resisting and organic solvent-tolerant, and also have good service time.
该聚合物与环氧树脂形成的涂膜兼具酚醛树脂型和环氧树脂型涂膜的优异性能，耐酸、碱和有机溶剂，而且使用期较长。
The films remain properties of both cardanol-formaldehyde resin and epoxy resin , which are acid-resisting , alkali-resisting and organic solvent-tolerant, and also have good service time.
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