平面

The best orientations and sections in TEE based on the visible heart are helpful to simplify the operation procedure of multiplane TEE and to shorten the examination time.

可视化心脏模型与多平面TEE进行对照研究所确立的多平面TEE最佳方位和常用切面，简化了诊断法洛四联症的操作过程，缩短了检查时间。

Secondly, the hearts of normal adults were detected using multiplane TEE, compared with the thin sectional anatomy, and the structural regularity of the four orientations of multiplane TEE scans was analyzed and summarized.

其次，采用多平面TEE技术，对正常成人的心脏进行检测，与相应的薄层断面解剖学进行对照研究，对四个方位的多平面TEE切面的形态学规律进行分析和总结。

At last, the best sections and orientations which were ensured by the comparable study between the thin sectional anatomy and multiplane TEE were used to diagnose the heart diseases. The best orientations and sections for diagnosing heart diseases were summarized and analyzed.

最后，将薄层断面解剖和多平面TEE对照研究所确立的最佳显示切面和显示方位进行临床验证，即用于诊断心脏各种常见疾病，分析和总结多平面TEE诊断心脏常见疾病的常用方位和最佳显示切面。

The molecular structure of 9,9 '-spiral Spirobifluorene has a very characteristic , which has two planar aromatic structure .they were connected through the only carbon atom and form the mutually perpendicular and structural stability of the cross-plane.

9，9'-螺双芴的分子结构非常有特点，两个具有平面结构的芳香环，通过唯一的碳原子连接构成相互垂直、结构稳定交叉平面。

METHODS: Measurement of palatal raphe area first three-dimensional reconstruction of images at up to nasion plane centerline, whichever was determined as a reference surface plane, selection one point on incisor cervix in this line, to measurement of the available palatal bone height; sagittal views were selected at 6 mm dorsally from the incisive canal. The available bone height was defined as the distance from the palatal baseline (lower cortical border of the palate) to the nasal cavity (upper cortical border of the nasal cavity).

先在三维重建图像上以鼻根为准确定面中线平面为参考平面，在此线上选择1个位于中切牙牙颈部的点，在其矢状位图像上，选取位于口腔内侧骨皮质上距切牙孔后缘6 mm处为标测点，通过此点向硬腭做垂线确定腭骨厚度，测量范围自口腔内腭部骨皮质外侧边缘至鼻腔侧骨皮质外侧边缘。

In general, the influence of the offset can be reduced to a negligible quantity by choosing suitable target size.

当影像平面与目标平面不平行时，圆形标志的像为椭圆，而椭圆中心并不是圆形标志的中心，它存在偏差。

The influence of the material Poisson's ratio on the strain, stress and neutral plane in the direction perpendicular to the magnetization is prominent, but insignificant for the stress, strain and the neutral plane in the direction of magnetization, and further, its role can be neglected.

材料泊松比对垂直于磁化方向的应力和应变以及中平面的影响很大。但是，泊松比对磁化方向的应力，应变和中平面的影响很小，可以忽略。

The contrastive research is fully conducted from Chapter Four to Chapter Six. Chapter Four studies negation in English and in Chinese at the lexical level, which can be further divided into three sublevels, namely, morpheme, word, and phrase. Chapter Five studies negative sentences, explicit negative form at the syntacticlevel. And the study covers the classification, syntactic feature, nonassertive/assertive items, scope/focus of negation, two important tendencies, and some common special negative sentences. Chapter Six focuses on the implied negative sentences in English. According 10 devices employed to achieve negation, implied negative sentences are divided into four categories, namely, implied negative sentences by grammatical devices, by semantic devices, by rhetorical devices, and by pragmatic devices.

从第四章到第六章具体地展开了英汉否定对比研究：第四章的研究在词汇平面上进行，分为语素、词语和词组：第五章对比研究了在句子平面上英汉否定中的显式现象—否定句，主要涉及否定句句法特征和分类、句型转换、否定范围和否定焦点、全句否定和局部否定、转移否定、双重否定、部分否定和全部否定、强调否定和否定问句回答等方面；第六章集中研究了英语含蓄否定句，按照一个含蓄否定句采用何种手段实现意义上的否定进行一下分类，把含蓄否定句分为四类—通过语法手段实现的含蓄否定句，通过语义手段实现的含蓄否定句，通过修辞手段实现的含蓄否定句，通过语用手段实现的含蓄否定句。

A unit vector normal to the plane of T and N , which is the plane of curvature.

B垂直于 T 和 N 所构成的平面的单位向量，该平面为曲率所在的面。

Provide an opportunity for them to appreciate the application of direction of a line and the normal of a plane.

使学生体会直线方向向量，平面法向量的作用，加深对直线或平面方程中点坐标的理解。

But we don't care about Battlegrounds.

但我们并不在乎沙场中的显露。

Ah! don't mention it, the butcher's shop is a horror.

啊！不用提了。提到肉，真是糟透了。