在...范围内

The temperature dependence of functional parameters and the community structure (20-50℃) were studied for colonizing protozoan community by means of polyurethane foam unit and glass slide.

在水温20—50℃范围内，应用PFU和挂片法收集原生动物群落。

An alternative way of the synthesis of methanol from syngas is low-temperature methanol synthesis via methyl formate in liquid phase, namely, carbonylation of methanol in the first step, and hydrogenolysis of methyl formate in the second step.

低温液相甲醇合成是指在（80-160℃）范围内，甲醇首先与合成气中的CO发生羰基化反应生成甲酸甲酯，甲酸甲酯再氢解生成甲醇的两个反应在一个反应器内串联进行的方法。

The optimal conditions were: pH 2.5～3.5, methanol/lanolin of 10/1, temperature 200 ℃, time 8 h.

在140～200 ℃范围内，产率随着反应温度的升高而增加。

Live birth rates following microsurgical tubal reversal have been reported to range between 55-81% in several reported series.

根据几项不同的研究报告，显微输卵管复通术的活产率约在55~81%范围内。

At the optimum condition, which is at normal pressure and temperature 175-185 ℃, in mole ratio of phenol to DMC of 3:1, in 2 weight percent of catalyst to DMC, in 9ml/h of DMC feed rate and for reation period of about 12 hours, the yield of DPC is 23.5%, methyl phenyl carbonate yield is 47.89%, and the conversion of DMC is 82.4%. The reaction process was monitored and the reaction products were analyzied through gas chromatography and mass spectrograph.

在最适宜的反应条件下，即常压、温度在175-185℃范围内、苯酚与DMC摩尔比为3：1，催化剂与DMC摩尔比为2%左右、DMC滴加速率为9m1/h、反应12h，反应DMC总转化率为82。

The obtained maximum relative standard deviation was 5.89%, and relative errors were -20.99%-15%.

实验结果表明，测量结果的相对标准偏差最大为5.89%，相对误差在-20.99%～15%范围内，说明对铝合金样品成分进行定量分析，激光诱导击穿光谱是一种有效的光谱分析工具，但是分析结果的准确度仍需要提高。

For the same core material and at approximately the same current rating, a 10 microhenry inductor will be typically offered at roughly half the size and cost of a 50 microhenry inductor.

例如，用纹波电流驱动一个1A的白光LED (VF≈ 3.5V)，ΔIF需要满足±5%范围内，输入电压12V，频率为500kHz，在电感电流幅度为1.1A时，只能允许使用50mH的电感。

The equilibrium molalities of ReO4(superscript -) were measured at ionic strengths from 0.1 to 2.0 molkg^(-1) in the aqueous phase and at constant initial molality of extractant in the organic phase at temperatures from 278.15 to

在N235+(NH4)ReO4+n-C7H16+HCl+H2O体系中，在温度278.15~303.15 K和离子强度0.1~2.0 molkg^(-1)范围内，以NH4Cl为支持电解质，在HCl体系中测定了萃取平衡水相中ReO4浓度和pH值。

At water temperature of 16.0-17.2 ℃, the process of embryonic development could be divided into 24 stages, which were described as follow: fertilized egg at 0 min, 2-cell stage at 75 min post fertilization; myotome forming stage at 43 h PF, and hatching-out stage at 94 h PF when the accumulative temperature reached 1616.8 ℃.h, and the average size of larvae was about 3.8 mm in body length.

梭鲈胚胎发育过程可分为24期，在水温16.0~17.2℃范围内，受精75 min开始第1次卵裂，受精后43 h开始形成器官，受精后约94 h开始出膜；刚出膜的仔鱼全长平均为3.8 mm；从受精到孵化出膜总积温为1 616.8℃。h。

In 35℃～20℃, pH is descending slowly and DO is going up gradually in nitrification.

在35～20℃范围内，SBR2硝化反应过程中pH缓慢下降，DO缓慢升高。

A major factor in deviation from optimal performance of the activated sludge secondary clarifier is the presence of density currents,resulting from the density difference and temperature difference.

异重流的形成是影响活性污泥系统二沉池水力学性能的主要因素，形成异重流的主要原因包括沉淀池内不均匀的污泥分布和温度分布。

You always nip it in the bud.

你总是有办法解决的。