那座桥在没有任何先兆的情况下坍塌了。
规则十五：巨大损失很少会没有先兆的。
但其实，很多疾病在突发前都有一些身体上的先兆，只不过没有引起足够重视罢了。
But in fact, many diseases in emergencies before have some indication on the body, but did not draw enough attention.
越南的困难是亚洲其它地区危机的先兆吗？
Could Vietnam's difficulties be a harbinger of trouble elsewhere in Asia?
这是暴风雪欲来的先兆。
这一脑部活动被认为是先兆偏头痛的成因。
This brain event is considered to be the cause of migraine aura.
是投机行为盛行？是因为货币发行过量？还是全球范围通货膨胀失控的先兆？不是，都不是。
Is it speculation run amok? Is it the result of excessive money creation, a harbinger of runaway inflation just around the corner? No and no.
Discovery或许将成为另一波冲击西方医疗保健行业(及其他高级服务业)领导地位的先兆。
Discovery may be a harbinger of another wave which challenges the West's lead in health care and other sophisticated services.
我认为这就是短期影响和长期影响共同的先兆。
I see that as a predictor of both short-term and long-term effects.
南半球温带气旋：气候变化的先兆？
Extratropical Southern Hemisphere Cyclones: Harbingers of Climate Change?
这些光斑常常是形成太阳黑子的先兆。
These faculae frequently are the forerunners of sunspot formation.
首先出现水位的逐渐变化，这是风暴到达前几小时的先兆。
Firstly comes a gradual change in water level, the forerunner, a few hours ahead of the storm's arrival.
这类事件可能是和平的先兆。
11月的空气刺痛了我的脸颊，这是冬天要来的先兆。
但有一点是清楚的，那就是对于一小部分人来说，过度上网可能是抑郁倾向的先兆。
What is clear is that for a small subset of people, excessive use of the internet could be a warning signal for depressive tendencies.
到达戈壁滩的先兆是车厢里的尘土越来越大，“戈壁，戈壁！”
It was the increasing levels of dust in the carriage that first signalled the Gobi was upon us. 'Gobi!
洛杉矶就是这一新兴文化的先兆。
“过多呵欠的症状经常是癫痫病人病情发作的先兆，而且可以预测头痛病人偏头痛的发作，”他补充道。
"Bouts of excessive yawning often precede the onset of seizures in epileptic patients, and predict the onset of headaches in people who suffer from migraines," he added.
所以，即便存在证据表明患有先兆偏头痛的病人有较高风险患有P.F.O.（反之亦然），也没有确定的证据能够说明两者存在因果关系。
So, while the evidence is mounting that if you have migraine with aura, you are at increased risk of having a P.F.O. (and vice versa), there is no firm evidence that this association is causal.
兹有事例可以证明：近期小麦价格的高涨(由澳大利亚的干旱所引发)正是对气候改变影响食物产出这种潜在可能的先兆。
Arguably, the recent surge in wheat prices (prompted by an Australian drought) is an early indicator of the potential for climate change to disrupt food output.
地震的发生没有先兆，因此现在就做好准备相当重要。这样你才能在灾难来临时应对自如，进行有效的自我保护。
Because earthquakes occur without warning, it's important to take preparing steps now, so that you know what you can do and how to respond with constructive self-protection.
世界银行声称上涨的粮食价格已经使得世界的贫困人口又增加了4.4千万，而贫困则是营养不良的先兆。
The World Bank said that surging food prices have pushed an extra 44m people worldwide into extreme poverty, which can often be a precursor to malnutrition.
先前的研究突出显示，年龄较大的女性不孕症发生率更高，她们患糖尿病和先兆子痫的风险也更大。
Previous studies have highlighted the growing infertility rates for older women and the greater risk of them developing diabetes and pre-eclampsia.
虽然距离下一年选举开始还有好一阵子，但目前的先兆预示着民众对此的期盼可能要落空了。
Plenty of time still remains before the start of next year's campaign. But the early signs suggest such hopes are likely to be disappointed.
上面以南极为中心的地图是根据“先兆”人造卫星上的臭氧监测仪的数据绘制的。
The south pole-centered map above is based on data from the Ozone Monitoring Instrument (OMI) on the Aura satellite.
科学家认为北极地区对全球气候变暖非常敏感，同时他们对密切监测可能出现的气候变化先兆特别感兴趣。
Scientists consider the Arctic highly sensitive to global warming and are particularly interested in closely monitoring its changes as possible harbingers.
确实，我们已经可以看到现在这场动荡的先兆了。
Indeed, we can already see the first symptoms of the coming upheaval.
确实，我们已经可以看到现在这场动荡的先兆了。
Indeed, we can already see the first symptoms of the coming upheaval.
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