置换的

H%Otjs%}'D$IYo%^+F0 Objective To appraise objectively the myocardial protective effect of beating heart with mild hypothermia and cardiopulmonary bypass with cardiac arrest by cold cardioplegia perfusion during openheart operation for mitral valve replacement.

目的 用体视学定量法对比分析两种二尖瓣置换术对心肌超微结构的影响，旨在为浅低温体外循环心脏不停跳心内直视手术对心肌保护效果作进一步客观的评价。

Cavity displacement method and polymer pickling process could be used for the preparation of linalool formulation, which could provide new control measures to spacial repellent for insect, environmental contamination and insect resistance.

采用空穴置换法与聚合物浸渍法均可达到对芳樟醇的理想释控状态，为空间驱避昆虫、缓解环境污染和抗药性等问题提供了新的防控手段。

It is the first report that CHS-like gene exists in liverwort, which indicates that the origin of chs is older than the outcoming of moss.

与裸子植物相比，被子植物中CHS基因发生较多的置换，但两者受到的选择作用相似。

Among thses matrices, bidiagonal matrix and approximately lower triangular array matrix have determinate construction and can provide linear encoding algorithm, and both subscript matrices, masking matrix and permutation matrix need to be redesigned.

其中双对角线矩阵和近似下三角阵列矩阵是确定结构的，具有高速线性编码的功能；而两种下标矩阵、模板矩阵和置换矩阵均具有类随机结构特征，可以根据需要进行再设计。

During development of the somatic macronucleus, Oxytricha trifallax destroys 95% of its germ line, severely fragmenting its chromosomes, and then unscrambles hundreds of thousands of remaining fragments by permutation or inversion.

在发展体macronucleus ， oxytricha trifallax摧毁了95 ％，其胚芽线，严厉过于分散，其染色体，然后unscrambles数以十万计的其余片段的置换或倒置。

Artificial joint replacement basically meets the physical requirements of joint function, maintains majority of normal range of motion, and restores majority of joint function. Moreover, the prosthesis source is abundant with no rejection.

人工关节置换可以基本符合运动损伤后关节功能恢复的生理要求，保持原关节的大部分活动度，恢复后大部分功能良好，而且假体来源不受限，无排斥反应。

BACKGROUND: Osteoblasts derived from bone marrow stromal stem cells are the main force of the cells in bone marrow cavity. In the artificial joint replacement cases, their life situation is closely related to conductive pressure of prosthesis.

背景：骨髓基质干细胞来源的成骨细胞是骨髓腔内主要的受力细胞，在人工关节置换病例中，其生命活动状况与假体传导压力有密切关系。

Luo Jie is good at transposition, creating misunderstandings between the materialness of non-material and the non-materialness of material.

罗杰运用置换手法，让非物质的物质性与物质的非物质性之间产生歧义。

The development of a theory is equal to a conscious representation under a conditionof the context metathesis.

理论的创新发展问题就是语境置换条件下理论的自觉呈现问题。

Therefore, it isthe emphasis to enhance the thermal stability and improve their tolerance of rutheniumcarbene complexes in olefin metathesis at present.

因此，提高钌卡宾配合物的稳定性，改善其对较强配位能力官能团容忍性是目前烯烃交互置换反应研究的重点。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。