查询词典 primary element

Iron was the primary chemical element of the corrosion scale,and the composition of the scale was iron compou...

铁是管垢最重要的化学组成，管垢基本上是含铁的化合物。

The primary work and remarks of the paper are as follows:(1)Stress intensity factors of gun barrel under inner pressure are obtained by finite element method.

本文以国防预研课题为背景，以武器身管为研究对象，应用了疲劳断裂理论和概率统计知识进行了身管安全性问题分析。

The primary work and remarks of the paper are as follows:(1) Stress intensity factors of gun barrel under inner pressure are obtained by finite element method. The accuracy of displacement method and stress method are compared. Some patterns of dynamic stress intensity factor are studied.

论文所做的主要工作和研究成果如下：(1)通过有限元方法计算了身管在内压作用下的应力强度因子，比较了位移法和应力法的精度，并且研究了动态应力强度因子的规律性。

In this paper, the primary terms in closed form, which are essential to the influence of interference effects of the notches are obtained by means of the modification of body force densities, the adoption of local coordinates with respect to the center of each notch element and the decomposition of Melan's fundamental solutions. Thus an improved body force method is proposed for analyzing interference effects of random boundary notches subje-cted to complex loads.

本文通过修改体积力密度的定义、引入建立在各缺口单元中心处的局部坐标并分解Melan基本解，获得了影响缺口群相互干涉效应的主项封闭解，从而建立了能有效地分析复合载荷作用下任意边界缺口群相互干涉效应的改进型体积力法。

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。