有效时间

The pH, acetic acid, propanoic acid and VFAs were detected, in Selenomonas ruminantium culture fluid at Oh, 6h, 12 h, 24 h, 36 h, after adding yeast. The results indicated that lactate uptake can be stimulated by all of the six yeast strains at all of six concentrations levels.

实验设6个酵母组和一个未添加酵母的对照组，为了检测酵母的最适添加浓度和有效作用时间，将每一个酵母组均设6个浓度水平：2g／L，4g／L，6g／L，8g／L，10g／L，12g／L，并且在实验的0h、6h、12h、24h、36h分别取样，检测培养液的pH值和乙酸、丙酸等挥发性脂肪酸的含量。

Double-solvent extraction method is a useful method to determine the formation time of inkpad seals.

双溶剂提取法是判定印泥印文形成时间的一种有效方法。

The mechanism of molecular distillation was analyzed in this paper.

分子蒸馏是一种新型的分离技术，与传统的分离技术相比：操作温度远低于液体沸点，蒸馏压力在极高真空度下，受热时间短，系统基本绝氧，能最大限度地保证物系中的有效成分。

Insulin Glargine and Insulin Detemir that had been used in clinic in home and abroad recently are both true basal insulins. Though they metabolised with essentially no peaks or valleys, the duration of the pharmacodynamic action are no more than 24 hours.

国内外运用于临床不久的两种长效人胰岛素类似物：甘精胰岛素和地特胰岛素无明显的代谢波峰和波谷，是真正意义上的基础胰岛素，但其有效控制血糖时间仍不能超过24 h。

When the system were free of 〓 could also induce the emission of luminous intensity.

激光光解时间分辨技术是定性定量研究光物理化学的最有效手段。

By analysis of the principle, the new methods reduce the times of the multiplications effectively. Simulations validate the new methods.

计算过程分析和仿真实验都表明算法中乘法计算次数大大减少，从而有效降低了计算时间。

The numerical results show that the simulation accuracy and efficiency are raised effectively by removing oversampling both in space and time domain.

一系列数值试验表明，该方法能够在保证模拟精度的同时，通过有效降低空间与时间维度上的过采样来显著提高弹性波模拟的效率。

Half the battle against impulse buying is just stepping back and taking time to think before you buy.

抑制冲动购物的最有效的战术就是望物却步然后在你买之前花时间考虑清楚。

The spatial continuation direction does not change with varied freq...

理论数据和实际资料处理结果表明，将这种方法用于时间域和频率域的去噪均能起到压制噪声的效果，有利于展宽有效频带，提高分辨率。

The application results of the N2 injection technology in Guantao reservoir of Du 84 block showed that the N2 injection technology during SAGD process was feasible and beneficial for expansion of steam chamber in sideways and increase of the horizontal sweep volume. N2 injection during SAGD process could effectively control the down flow of top water and lengthen SAGD production time by 3-4 years. Both the reservoir recovery factor and oil steam ratio could be improved.

研究结果表明，氮气辅助SAGD开采技术在杜84块馆陶油层开采中是可行的，有利于蒸汽腔的侧向扩展，增加蒸汽的横向波及体积；在SAGD过程中添加氮气能够有效控制顶水下泄，延长SAGD生产时间3～4年，提高了油藏采收率和油汽比。

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。