三两个...

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。

5S-160GP/9T-160 consists of a main case driven by 3-shaft fixed spindle and a rear mounted auxiliary case driven by planet gears. The main case has 5 forward speeds and 1 reverse speed. The auxiliary case has 2 speeds which double the speed of the main case, so that the transmission has 9 forward speeds, the 4 forward speeds of main case shift by ZF-BK short travel synchronizer, auxiliary case shift by lock ring synchronizer, crawler and reverse shift by join sleeve powered by the engine of 280-380 hp.

5S-160GP/9T-160型变速器由三轴传动的主变速器和后置的行星齿轮传动副变速器组成，主变速器有五个前进档和一个倒档，副变速器有两个档位，可将变速器的档位增加一倍，故变速器具有九前一倒档，主变速器4个前进档采用ZF-BK型短行程同步器换档，副变速器采用锁环式同步器换档，爬档和倒档采用接合套换档，用户可根据需要选装部分功率取力器N71 /1或N71/2， N70。

According to the morphological traits (Simmonds N.W.,1955,1962 ) for cultivars and wild species of Musa, Eight cultivars with different ploidy and genomic composition in this research were divided into three types: AA, AA and AAAB.

根据Simmonds(1955、1962)对栽培蕉利野生蕉的形态学分类系统，本研究的8个香蕉和大蕉品种分属AA、AAA、ABB三种类型；12个野生蕉种质分属芭蕉属的两个组：南芭蕉组和真芭蕉组。

In the U.S., Straus and his colleague Mallie Paschall of the Pacific Institute for Research and Evaluation, looked at 1,510 children — 806 kids ages 2 to 4, and 704 ages 5 to 9 — and found that roughly three-quarters had endured some kind of corporal punishment in the previous two weeks, according to interviews with the mothers.

在美国，斯特劳斯和他的同事太平洋研究与评价协会的麦莉帕斯凯尔，观察了1，510名儿童——806个孩子年龄在2至4岁，704个年龄在5至9岁——根据和孩子母亲的交谈，发现大约四分之三在过去两个星期里遭受了一些形式的体罚。

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。