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Though many observers define a recession as two consecutive quarters of contraction in the economy, NBER takes a broader view.

尽管许多观察家定义经济衰退依靠两个连续季度的经济萎缩，NBER看得更广。

The remaining 1% is present in body tissues and fluids where it is essential for cell metabolism, muscle contraction and nerve impulse transmission.

剩余的1 ％存在於人体组织和液体的地方是必不可少的细胞代谢，肌肉收缩和神经冲动传递。

Dogs need magnesium, potassium, and sodium for nerve impulse transmission, muscle contraction, and cell signaling.

狗也需要其余矿物质，如镁、钾和钠，来支持神经传导、肌肉收缩及提供细胞信号。

Calcium is essential in the body for many functions including bone formation, blood coagulation, muscle contraction, and nerve impulse transmission.

钙是宠物必不可少的，包括骨形成，血液凝固，肌肉收缩的功能很多，和神经冲动的传输。

Oxytocin , a nonapeptide, is mainly synthesized in the supraoptic nucleus and paraventricular nucleus of mammals' hypothalamus, and secreted into peripheral blood through neurohypophysis when stimulated to act on the target tissues like mammary gland or myometrium. Hence, the milk ejection or myometrium contraction is induced.

催产素是一种9肽神经内分泌激素，在中枢神经系统(Central nervous system，CNS)中，主要在下丘脑视上核(Supraoptic nucleus，SO)、室旁核(Paraventricular nucleus，Pa)的大细胞内分泌神经元中合成，并经神经垂体释放入外周血，作用于其靶组织如乳腺和子宫平滑肌等，发挥促射乳、促宫缩等作用。

In chapter one,the backgrounds and current situation of operator theory in Banach space are introduced and the preliminaries of Banach space are given.In chapter two,we study the existence and uniqueness of fixed point for decreasing strict-set-contraction operator in product space.Under the weak continuous condition,we obtain the existence and uniqueness of fixed point for decreasing operator and we give an application of these results; In chapter three,we get several positive fixed point theorems of decreasing operator and the existence and uniqueness theorems of positive fixed point for operator C=A+B,C=D-A in real Banach space where the order is decided by a normal cone; In chapter four,we obtained some existence and uniqueness theorems of fixed point for some mixed monotone operators in semi-ordered Banach space.

在第一章中，主要介绍了半序Banach空间非线性算子的研究历史背景、现状以及半序Banach空间中的预备知识；在第二章中，我们利用半序方法研究了Banach乘积空间中严格集压缩减算子不动点存在唯一性问题，在弱连续的条件下，得到了不动点的存在唯一性和迭代收敛性，同时，给出了它们的一些应用；在第三章中，我们建立了拟弱连续减算子的正不动点定理，并证明了算子C=A+B，C=D-A的正不动点存在唯一性定理；在第四章中，我们得到了半序Banach空间中混合单调算子的不动点存在性及唯一性定理。

Objective:To evaluate the possibility and accuracy of Doppler Tissue Imagingon assessment of normal myocardial activation and contraction sequence.

目的：探讨多普勒组织成像(Doppler Tissue Imaging，DTI)评价正常心肌激动起源及传导顺序的可行性及准确性。

Firstly, the preprocessed approach is similar to the anatomical one. The relation between surface of muscle and underlying structure is studied in order to comprehend the contraction of muscle.

步骤首先是采用类似于解剖学中采用的方法——分析肌肉表面形态与下垫结构之间的关系——理解并表现肌肉形状的变化。

In addition, lack of sleep will make your body tense, such a loose state so that a tight orbicular muscle contraction disorders, there twitching eyelids.

此外，睡眠不足会使你的身体紧张，这样一个松散的状态，这样一紧轮匝肌收缩失调，有眼皮跳。

If a certain part of orbicularis oris muscle fiber contraction in a sudden stop, there will be "eyes and jump."

如果有口轮匝肌纤维收缩突然停止在某一部分，将有"眼睛和跳跃。"

A historical region of southwest France between the Pyrenees and the Garonne River. The duchy of Aquitaine was joined with France after the marriage of Eleanor of Aquitaine to King Louis VII in1137, but its possession was disputed after her subsequent marriage to Henry II of England.

阿基坦法国西南部一个历史地区，位于比利牛斯山和加隆河之间，在1137年阿基坦的埃莉诺与国王路易斯七世结婚之后阿基坦公国加入法国，但当她再嫁英国亨利二世后，其归属权便受到争议

There are moments when I look at the smiling , happy faces of my expectant staff and wonder how they will cope when confronted by an outraged housemaster along with an unrepentant and recalcitrant bleached blond teenager in 18 years ' time .

有时候，我看着那些满怀期待的员工微笑，幸福的脸，想着当他们遇到一位愤怒的宿舍管理员和一位不知悔改，叛逆，而且将头发染成白色的18岁少年时，他们会如何处理。