元素

To minimize the contamination of detrimental elements such as sulfurand chlorine, a two-step sol-gel process was successfully developed to synthesize SiC precursors with oxalic acid and hexamethylenetetramine HMTA as the catalysts, which are free of sulfur and chlorine. Tetraethoxysilane TEOS and phenolic resin were used as the silicon source and carbon source, respectively.

为了尽量减少硫、氯等有害元素的含量，本文用不含有害元素的草酸和六次甲基四胺HMTA为催化剂，正硅酸乙酯TEOS为硅源，酚醛树脂为碳源，成功探索出了制备SiC前驱体的两步法溶胶-凝胶工艺。

After executing this statement, slist1 has 10 elements, each of which has the value Hiya!.

执行了上述语句后，容器 slist1 有 10 个元素，每个元素的值都是 Hiya！。

This paper discusses the kernel of the system -- geometric model and includes the following:(1) The topological elements and the relation between them in geometric modeling system are explained and expressed by the theory of simplicial complex and CW-complex. In addition, the identification operators and homology theory in algebraic topology are used in our model. A hierarchical structure is built on the base of complex.

本文主要讨论这个系统的核心问题——几何建模问题，包括以下几个方面内容：(1)用单纯复形和CW复形的理论来解释和表达造型系统中的拓扑元素和拓扑元素之间的相关关系，并将代数拓扑中的粘合操作和同调论应用到模型中，建立以复形为基础的层次结构。

Water is composed of the elements hydrogen and oxygen.

水是由氢元素和氧元素组成的。

According to the differences in chemical and structural characters of WO42- and MoS42- the actions of them to separator molecular such as bonding, hydrophile/hydrophobia and geometry are discussed by using mineral flotation as reference.

以相似元素钨和钼的分离为例，根据WO42-和MoS42-的结构特征，从价键因素、亲水-疏水因素、几何因素等方面分析了它们与吸附剂的作用，成功选择了有色金属硫化物作为选择性吸附剂，实现钨和钼的高效分离，并进一步探讨了吸附剂的改性优化和其它类似元素的深度分离问题。

For hyperthyroid group, there are significant correlations between elements measured and between thyroid hormones, but not between elements and thyroid hormones.

在甲亢组，元素间存在显著性的相关，甲状腺激素水平间也有显著性的相关，而元素和甲状腺激素间未见显著性相关。

The results showed that the herb was rich in vanadium and lithium and tin, but low in zinc and copper, and had a strong tendency to accumulate titanium, lithium and boron. The pharmacological effects of geo herbal Asarum L. seemed to be closely related with its characteristic contents of trace elements which were mainly affected by the idioplasm and various other minor factors.

结果显示，细辛道地药格中V、Li、Sn等元素的含量较高，Zn／Cu比值较低，细辛对Ti、Li、B等元素有较强的富集作用，细辛的药理活性与细辛道地药材的微量元素含量特征有一定的相关性，种质是影响细辛道地药材中微量元素含量的主要因素，从微量元素的角度来看，细辛道地药材的形成模式是以种质为主导的多因子关联决定型。

Nowadays, many college students unwillingly and inactively study in English Class, however, almost all of them like popular English Culture. So facing the situation, college English teachers must pay attention to the importance of popular English Culture of students' spiritual life, try to importsome elements of popular English Culture into English class to stimulate students' interest and passion for study, and think how to properly and effectively use these elements in normal class-teaching--through the way to achieve the goal of "teaching is implied in entertainment".

李纾淇 摘要：针对当今大学生在英语课堂上学习被动，但普遍又喜爱英语流行文化的现状，大学英语教师应当注重英语流行文化在学生的精神生活中所占的重要地位，尝试将英语流行文化元素引入课堂教学以激起学生的兴趣和学习热情，并思考如何在正规的课堂教学中适当而有效的运用这些文化元素，达到寓教于乐的目的。

In addition, this thesis introduces the inclusion relation of elements and the influence on the parent element after the change of the children.

更进一步的是，本文在自动更新问题原型中考虑了包含关系和子元素改变后对父元素的影响。

Each element has an index , which is a number corresponding to the element's position in the array.

每个元素均有一个索引，索引是一个数字，代表元素在数组中的位置。

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。