两三个

Model of theory of pedagogic knowledge structure includes 3 bases, 5 are propped up and two core.

教师知识结构理论模型包括三个基础、五个支撑和两个核心。

Results show that phenanthrene, anthracene have three stronger fluorescence regions, and pyrene, fluoranthene have several and two fluorescence regions, respectively.

实验表明：菲与蒽均有三个较强的荧光区域；花有多个荧光区域；荧葱有两个荧光区域。

But now, when, as I have said, I began to beweary of the fruitless excursion which I had made so long and sofar every morning in vain, so my opinion of the action itself beganto alter; and I began, with cooler and calmer thoughts, to considerwhat I was going to engage in; what authority or call I had topretend to be judge and executioner upon these men as criminals,whom Heaven had thought fit for so many ages to suffer unpunishedto go on, and to be as it were the executioners of His judgmentsone upon another; how far these people were offenders against me,and what right I had to engage in the quarrel of that blood whichthey shed promiscuously upon one another.

星期五在小船上打死打伤的那五个，情形也一样。他们中有三个确实是受了伤倒下的，另外两个却是吓昏了倒下的。这时候，我手上仍拿着一支枪，但我没有开枪，因为我已把手枪和腰刀给了那西班牙人，手里得留一支装好弹药的枪，以防万一。我把星期五叫过来，吩咐他赶快跑到我们第一次放枪的那棵大树边，把那几支枪拿过来。他一下子就取回来了。于是我把自己的短枪交给他，自己坐下来给所有的枪再次装上弹药，并告诉他需要用枪时随时可来龋正当我在装弹药时，忽然发现那个西班牙人正和一个野人扭作一团，打得不可开交。那个野人手里拿着一把木头刀跟西班牙人拼杀。

After you can play one quadruplet well, practice playing two in succession, then three, etc.

一旦能把一个四音组弹好，那就连续练习两个四音组，直至能轻松地掌握到，然后就三个、四个…等等。

The simulated results after the assimilation show that it is the best to perform the intensive radiosonde observation in the upstream of the rainfall area and the moisture passageway area at the same time to improve the heavy rainfall forecast.

从个例研究结果来看，在同化时间窗都为12小时的条件下，使用加密探空观测资料进行三个时刻的数据同化形成的初值明显优于同化两个时刻的观测资料形成的初值。

In this research , a mathematic model is built for coverting internal coordinates into rectangular coordinates and calculating nucleus distances, bond angles and bihedral angles in a molecule.

本研究课题建立了将分子中原子的自然坐标变换成直角坐标，计算任意两个原子的间距，求解任意三个原子核连线的夹角和任意四个原子构成的二面角的数学模型。

In fact, most people just want to get an answer no matter it is true or false. Such answers always serve as the chicken soup for our soul always soot our anxiety and remove our pressure.

那么这一句应该调整一下，放到第一个论证段里，前面两个论证段都从不同方面进行分析，这里需要第三个方面而不是绕回原点。

Differentiation of secondarystructure of DNA between the two subgenera was mainly focused on theirsecond hairpin structures.

两个亚属间RNA次级结构差异主要集中在三个稳定发夹结构中的第二个。

Mitochondrial coxI,atp6 and orf25 DNA fragments for 12 species, which belong to two subgenera Pinus and Strobus of the genus Pinus, were amplified by polymerase chain reaction using gene specific primers. Their partial sequences were obtained by directly sequencing the PCR products with the same sets of primers.

本研究利用PCR和PCR产物直接序列分析技术，获得了分属于松属两个亚属Pinus和Strobus12个松树种coxI，atp6和orf25三个线粒体基因DNA片段的序列。

It should be considered from both economic and taw points of view, and be prepared before, during and afterward the anti-dumping charges.

应对国外反倾销是个系统工程，要从经济学和法学两个角度，从事前、事中、事后三个阶段全方位考虑。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。