NASA asteroid expert Don Yeomans, head of the agency's Near-Earth Object Program Office, told SPACE.com that the object which exploded over a thinly inhabited stretch of eastern Europe today was most likely an exploding fireball known as a bolide.

Yeoman stressed that the bolide event was likely not associated at all with the incoming asteroid 2012 DA14, which will fly within 17200 miles ( 27000 kilometers) of Earth when it passes safely by our planet today.

耶麦斯强调说，这起火流星爆炸事件与即将掠过地球的小行星2012DA14没有任何关系、小行星2012DA14会安全地近距离掠过地球，与地球的距离不超过1.72英里（2.7千米）。

More and more evidences show that the volcanism might be the most likely cause of this event, although others triggers, such as sea level change, oceanic anoxia, bolide impact, methane gas hydrates, have not been excluded.

越来越多的证据显示火山作用是引起这次生物集群绝灭最可能的原因，虽然其他的因素，如海平面变化，海洋缺氧，地外行星撞击，甲烷及其水合物释放等，还没有排除。

The study of three dimensional photoelasticity ESTs for the friction join of steel and aluminium jointed by high intensity bolis

高强度螺栓摩擦连接的三维光弹性试验

Bolis furnace is an ideal apparatus for simulation of BF operation.

包里斯炉能定量描述炉身生产情况，是模拟高炉生产的理想设备。

The country has pretty much defeated the boll weevil, and the Department of Agriculture individually tests every bale on obscure measures such as the tensile strength of the fibres.

棉铃象虫在美国难以为害，农业部会拿纤维的抗拉强度等玄深标准逐个检测每个棉包。

In the long run, they saw that the boll weevil had, in fact, done them a favor by destroying their crops.

从长远来看，他们发现棉铃象甲虫虽破坏了农作物，但实际上反倒帮了他们的忙。

It's called the boll weevil because it destroys the cotton boll, the seed pod that contains the cotton.

之所以会被称为棉子象鼻虫，是因为这种昆虫会毁坏棉花球，以及含有棉花的种子荚。

Gossypol, which is produced by gland cells in the leaves of cotton, is an attractant to the boll weevil.

棉叶腺胞分泌的棉酚对棉铃象鼻虫是一种引诱剂。

But in the early years of the century, the boll weevil began devastating the cotton farms in the south.

然而在上世纪初期，棉铃象甲开始侵嗜美国南部的棉花农场。

You can also see in this photo that I began making the double cross bollards!

您也可以看到在这方面的照片，我开始把双交叉护柱！

Specify whether the light is standard or bollard.

请指定此灯是标准式还是柱式。

Installation of guidance channel of the floating mooring bollard of Three Gorges Permanent Lock

三峡永久船闸浮式系船柱导槽安装

In this paper, the detailed construction scheme and quality assurance measures for the floating bollard groove are introduced.

介绍了浮式系船柱槽的详细施工方案和质量保证措施。

Poland, Hungary, and the Netherlands also eat donuts, and Holland has ollie bollen, puffy, donut-like pastries filled with apples, raisins, and currants.

波兰、匈牙利和荷兰人吃甜甜圈。荷兰人的“甜甜圈”olliebollen质地松软，里面的馅儿有苹果、葡萄干和加仑子。

The Twitter-analysis program was written by Johan Bollen, professor of informatics and computing at Indiana University and he used it to predict market movements at the Dow Jones in New York with 87.6 per cent accuracy last October.

这个微博客的分析程序是由印第安纳大学信息和计算系的教授约翰·保伦完成的。他用这个来预测纽约股市的道琼斯指数，并且在上个10月份达到了87.6%的准确率。

Johan Bollen and his colleagues at Indiana University in Bloomington have created an anxiety rating based on an analysis of hundreds of millions of tweets by people in the US.

Johan Bollen和他的在印第安纳大学布卢明顿分校的同事们，在分析成千上万的美国人发布的推文的基础上，已经创建了一个焦虑等级。

For instance, a curious piece of research was published last year by three computer scientists, Johan Bollen, Huina Mao and Xiao-jun Zeng.

比如，去年3位计算机科学家约翰博伦（johan bollen）、毛慧娜（音译）和曾晓军（音译）发表了一篇奇特的研究报告。

Their paper has not yet been published, but Bollen says they too found that increases in anxiety on their scale correlated with lower than expected stock prices.

他们的论文还尚未公布，但是Bollen说他们也发现在他们可承受的范围之内焦虑的增长与预期的股票价格的关系甚浅。

Despite his doubts about social media stock picking, Prof Bollen believes broader Internet mood analysis could lead to something big, and likens the pursuit to the Californian gold rush.

尽管他质疑通过社交媒体选择股票的方法，但博伦教授认为，整体的互联网情绪分析能产生重大收获，就像当年加州淘金热一样。

Prof Bollen believes there is indeed value in looking at the broader emotional states of society on the Internet.

博伦教授认为，从互联网上研究整体的社会情绪状态确实有价值。