Based on the char-acteristic of large fluctuation in static head of the drainage pumping station of a hydropower station, this paper presents a mathematic model for economic operation of the pumping station with calculating method and example.

Example calculation shows that the steady state productivity model of snaky well should be used in calculating the productivity of a horizontal well with large fluctuation;

实例计算表明：当井的水平段起伏较大时，不能将其处理为水平井，而应根据蛇曲井产能计算模型计算其产能，否则将导致产能预测出现较大偏差。

Further studies show that, neither in the long run nor short run, the shock from exchange rate is the key factor to the large fluctuation.

进一步研究表明，无论短期还是长期，汇率冲击都不是造成贸易差额大幅变动的关键性因素。

Unlike normal commodities, perishable goods have long production cycle, short sale season and large demand fluctuation, which bring more difficulty to the coordination of such supply chain.

易逝品不同于一般商品，通常生产周期长、销售周期短、需求波动大，使制造商和销售商面临更大的风险，供应链协调的难度也更大。

In summer and autumn, the sediment is of find grain size, bad sorting and high BSi contents; in winter and spring, it is of coarse grain size, worse sorting, large fluctuation and low BSi contents.

研究发现夏秋季沉积物颗粒偏细、分选差，生物硅含量高；而冬春季沉积物颗粒偏粗、分选更差、各参数波动范围大，生物硅含量低。

Some research state clearly: random dynamic respond of large fluctuation levels can be given rise to random variability of structure's parameters and sometimes it becomes leading factor.

众多研究工作表明：结构参数的随机变异性可以引起结构随机动力响应的随机涨落，结构力学参数的随机性还可能成为主导因素。

Along with the liberalization comes large fluctuation of interest rate, quick rising of interests rate risk of commercial banks and thereafter many financial institutions' bankruptcies due to great losses caused by interests rate risk.

伴之而来的是市场利率大幅波动，商业银行的产品定价面临巨大挑战，利率风险急剧上升，大批金融机构由于市场利率波动造成的巨大损失而倒闭破产。

Sewage wastewater of the scenic spot, which consists in a large fluctuation of water character and flow, is required to be treated fully, especially its requirements of color and odor.

风景区生活污水的水质水量变化大，要求深度处理，尤其是色度和臭度。

There are two factors influencing identification of low-amplitude anticlines: One is the static correction problem caused by large fluctuation of the surface landform.

低幅度背斜识别的影响因素主要有两点：一是因地表形态起伏较大而引起的静校正问题，二是构造上倾方向存在速度异常。

Aimed at the problem of large load fluctuation and difficulty of steam balancing of the steam turbine bundle, DCS feedforward control system was used to control the steam pipeline network in ammonia plant to ensure safe and highly efficient operation of the compressor bundle.

针对大型机组汽轮机负荷波动大、蒸汽平衡困难的特点，使用DCS前馈调节系统对合成氨蒸汽管网进行控制，确保机组安全高效运行。

Further research illustrate that the laser system in a chaotic state is an equal-weight coupling state with more acute competing and more synergetic actions in different modes which presents characters of high intensity and large fluctuation in macroscopic scales.

进一步研究表明，处在混沌状态的激光系统中的不同模式处于竞争更激烈、协同作用更强的等权耦合状态，在宏观上表现出高强度、大涨落的特性。

The process has the advantages of flexible operation, higher buffer capacity, and higher removal rate of pollutants. The effluent quality basically reaches the standard under the large fluctuation of influent quality.

该工艺在进水水质波动较大的情况下，出水水质基本能够达标，具有运行灵活、缓冲能力强、污染物去除率高的优点。

Based on principles of internal combustion engine and fluid dynamics, combined with analysis of test behavior, the ensuing research test finds that the problem results from large pressure fluctuation in intake pipes.

相继展开的研究性试验，依据内燃机原理及流体力学等基础理论，结合对试验中的各种实际表象的分析，找到了原因是进气管压力波动较大所致。

Finally we find that the-effective critical current of RF-SQUID loop is greatly reduced by large fluctuation and the transition width can be determined with a simple equation.

结果表明：大的热涨落使RF-SQUID环路有效临界电流明显下降，从而使跃迁点大大提前，跃迁宽度满足一个普适表达式。

The experiments that the fluids reacted with minerals during crossing the critical state, indicate that the reaction rates experience a large fluctuation.

跨越临界态这一转变过程中的矿物水反应动力学实验结果表明了反应速率的大涨落。

It was revealed that too large salinity fluctuation was unbeneficial to the growth, but had less effect on the molt of juvenile F.chinensis.

盐度波动幅度过大不利于中国对虾稚虾的生长，但对蜕皮无影响。

Large pipeline fluctuation forms mechanical admixture and deposition of wax.

管道起伏大，易形成机械杂质、石蜡的沉积。

The results show that quasars distribute possibly in the universe with a large scale periodic fluctuation of a characteristic scale about 50h-1 Mpc.

因此，类星体在大尺度上的分布很可能具有大约50Mpc的周期涨落。

The conclusion is: the method of averager wind speed and standard deviation is the best and the method of cumulative distribution function is the better, the method of average wind speed and maximun wind speed has a large fluctuation because the maximum wind speed changed more randomly.

通过比较得到了以下结论：平均风速和标准差估计法效果最好，累积分布函数拟合法次之，由于最大风速变化比较随机，平均风速和最大风速估计法效果波动最大，整体效果差。

At latest year, the development of iron and steel industry more and more depends on imported iron ores in our country, and it results in the large fluctuation in the raw material.

近年来，我国钢铁工业的发展越来越多的依靠进口铁矿石，造成原料波动大。

Don't go trying, some new fashion.

不要尝试改变自己的风格。