交替发生

BACKGROUND: The microvolt T-wave alternans is an important index for ventricular arrhythmias prediction and is a promising tool to evaluate non-invasively malignant ventricular arrhythmia and risk of sudden death.

背景：微伏级T波交替是预测室性心律失常的重要指标，有望发展成为一种优越的无创评定发生恶性室性心率失常及猝死危险性的技术。

To see the golden sun and the azure sky, the outstretched ocean, to walk upon the green earth, and to be lord of a thousand creatures, to look down giddy precipices or over distant flowery vales, to see the world spread out under one's finger in a map, to bring the stars near, to view the smallest insects in a microscope, to read history, and witness the revolutions of empires and the succession of generations, to hear of the glory of Simon and Tire, of Babylon and Susan, as of a faded pageant, and to say all these were, and are now nothing, to think that we exist in such a point of time ,and in such a corner of space, to be at once spectators and a part of the moving scene, to watch the return of the seasons, of spring and autumn, to hear---The stock dove plain amid the forest deep

原文翻译：何为不朽我们看到金色的太阳，蔚蓝的天空，广阔的海洋；我们漫步在绿油油的大地之上，做万物的主人；我们俯视令人目炫心悸的悬崖峭壁，远眺鲜花盛开的山谷；我们把地图摊开，任意指点全球；我们把星辰移到眼前观看，还在显微镜下观察极其微小的生物；我们学历史，亲自目睹帝国的兴亡、时代的交替；我们听人谈论西顿、推罗、巴比伦和苏撒的勋业，如同听一番往昔的盛会，听了以后，我们说：这些事确实发生过，但现在却是过眼云烟了；我们思考着自己生活的时代、生活的地区；我们在人生的活动舞台上既当观众、又当演员；我们观察四季更迭、春秋代序；我们听见了--野鸽在浓密的树林中哀诉

TWA is a significant predictor for ventricular arrhythmia in patients with dilated cardiomyopathy.

T波电交替对预测DCM患者室性心律失常的发生有着重要价值。

In the second part, the winter wheat embroy under vernalization treatment was used to study the effects of non-stress-vernalization low temperature treatment on the development and operation of cyanide-resistant respiration and expression of AOX.

第二部分，我们以冬小麦为材料，研究了不同时期非胁迫春化摘要低温处理条件下冬小麦胚芽抗氰呼吸发生、运行和交替氧化酶表达的变化。

A series of fluorene and 2,2'-bipyridine or 1,10-phenanthroline alternate and random copolymers(P1 or P2) have been designed and synthsized, and their interaction with transition metal ions were investigated.The some accomplishments were achieved as follows:(1) It is found that the absorption red shift and fluorescence quench strongly in the presence of transition metal ions.

设计合成了一系列芴与联吡啶、菲洛啉的交替和无规共轭聚合物（P1、P2），通过研究它们与不同过渡金属离子相互作用，获得如下主要成果：（1）由于过渡金属离子的作用，吸收光谱发生不同程度的红移，以及强烈的荧光猝灭现象。

Among them, the black rings puts in order salt crust sand content to increase, but the white rings puts in order by the silt and the clay primarily. The light and shade interaction annulus of salt crust granulometric composition difference are showed that the saline lake passed by evolutionary process, because of the climate and temperature changes in turns, which causing the saline lake deposit ingredients have regular change results.

其中，黑色纹理处盐壳含砂量增加，而白色纹理处以粉粒和粘粒为主，明暗相间的环带盐壳颗粒组成差异是盐湖向干盐湖的演化过程中，由于气候冷暖交替变化而使盐湖沉积物成分发生规律性变化的结果。

They have several meters of paleosol developed on the top of overbank silt, suggesting that the abandonment of each terrace due to river incision occurs during the transition from glacial to interglacial climates and there may be a link between the production of terraces and glacial-interglacial climatic cycles. However, it is not every glacial-interglacial transition during the last 1,240ka that terrace can form and preserve.

黄河各阶地河漫滩顶部都有一层古土壤发育表明黄河下切形成阶地发生在古土壤开始发育的冰期向间冰期的过度阶段，但是并非1，240ka以来的每次冰期—间冰期的气候交替都能引起黄河下切形成阶地。

Vicissitudinary changes of temperature and humidity can easily induce shrinkage cracks,and sometimes these cracks reflect to surface of asphalt pavement.

但从多年的实际应用来看，这种水泥稳定碎石在温度或湿度交替变化时容易发生收缩裂缝和干缩裂缝，当沥青面层较薄时，这些裂缝会反射到面层，形成反射裂缝。

This text completely discusse the decision-making of long-term property investment and hope this issue will play an important role in the enterprise development foregrounded.

目前，我国投资领域的改革正在深入进行，在新旧体制交替阶段，投资理论和实践上都发生了很大变化，加之限于时间和水平，不足之处在所难免，深望各位老师批评指正。

The slip steps are produced on the slip lines by the interaction of the multi-slip. The direct reason of the creep fracture is that the rafted γ'phase is twisted and the micro-cracks are emerged in alloy due to the continuous cross-slips.

降低了台金的蠕变抗力两个滑移系统交割产生滑移台阶，连续的交替滑移使筏状γ'相发生扭曲、并产生微裂纹是蠕变断裂的直接原因

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。