先兆

Familiar inducement were prolonged standing(43.64%),change of position(20.00%),and so on.Common prodromes were dizziness(78.18%),impotence(29.09%),pallor(27.27%),sweating(27.27%),palpitation(25.45%),amaurosis(23.64%),dyspnea(21.82%),headache(21.82%)and so on.

结果74.55%和96.36%的VVS儿童存在晕厥诱因和先兆症状，常见诱因有长久站立(43.64%)、体位改变(20.00%)等；常见先兆症状为头晕(78.18%)、乏力(29.09%)、面色苍白(27.27%)、大汗(27.27%)、心慌(25.45%)、黑朦(23.64%)、胸闷(21.82%)、头痛(21.82%)等。

LIGHT-HEADEDNESS, PRESYNCOPE, AND SYNCOPE Serious heart disease or arrhythmias that significantly limit cardiac output may cause light-headedness, presyncope, or syncope (a sudden brief loss of consciousness, with loss of postural tone).

头晕，晕厥先兆和晕厥严重限制心排血量的严重心脏病或心律失常可引起头晕，晕厥先兆和晕厥(意识的短暂性突然丧失伴姿势张力丧失)。

Participants reporting headaches once or more per month were asked about migraine symptoms including nausea, unilateral location, photophobia, visual disturbance, and numbness.

在一个月中报告有一次或多次头痛发作的人会被问及有关偏头痛的症状，并被划分为无先兆性偏头痛、有先兆的偏头痛或是非偏头痛性头痛。

Something that prefigure s;a foreshadowing.

先兆预示的事物；先兆

Objective:To explore the treatment and relationship between premature rupture of fetal membrane, premature labor, threatened abortion and group B streptococcus.

目的：探讨生殖道B族溶血性链球菌感染与胎膜早破、早产、晚期先兆流产的关系，并提出相关干预措施，以降低胎膜早破、早产、晚期先兆流产的发生率。

Methods Inducement and prodrome of 55 children with VVS were analysed and compared with each other in different gender,age groups and mode of HUTT.Results 74.55% and 96.36% of children with VVS had inducement and prodrome.

方法分析55例经直立倾斜试验诊断为VVS儿童的晕厥诱因和先兆症状，对不同性别、不同年龄段(7~11岁及12~18岁)、不同试验方式儿童的晕厥诱因和先兆的有无进行比较。

No differences in the acetylator status were found between women with a history of preeclampsia only and those with the HELLP syndrome as well.

仅有先兆子痫史的妇女和先兆子痫伴HELLP综合征妇女间的乙酰化状态无差异。

Each place a lightning bolt zigs or zags is where one leader stopped and another one started. Each place a lightning bolt forks is where two separate leaders formed from the bottom end of a single leader above. This whole process takes only a few thousandths of a second, but that's enough time to sculpt beautiful and complex lightning bolts.

实际上，闪电形状上不规则之处就是&先兆&发生与消逝之处，闪电&枝丫&的地方就是前一&先兆&消后产生出另外两个&先兆&的地方，尽管这一现象的发生大概不过千分之几秒，但对于形成复杂而奇异的闪电来说，已经足够了。

While this is going on, the ground sends up its own chain of shorter, positively charged leaders.

在这一&先兆&转瞬间即逝过后另一&先兆&随即发生，副电荷的释放就顺着这一好像睡莲叶一般的&先兆&接近地面，与此同时，地面上的正极电荷也在&跃跃欲上&迎合副电荷的到来，当两极在空中几百码相遇时，就产生我们所见的闪电，闪电的不规则就源自&先兆&形状的唯一性。

All sinus arrest, atrial arrhythmia and atroventricular block occurred in the course of syncope or the portent of syncope. Ventricular premature beats occurred before syncope or the portent of syncope.

其中复合的窦性停搏、房性心律失常、房室传导阻滞均发生在晕厥或晕厥先兆症状出现时；而室性早搏出现于晕厥或晕厥先兆前；交界区性心律失常出现在晕厥或晕厥先兆当时或以后，平卧位后均逐渐消失。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。