According to the occurrence of yellow insects of covered crisp pear in Shanxi, this paper discusses the reasons why it occurs and provides integrated cure measures for yellow insects pests.
针对山西省酥梨黄粉虫的发生情况，论述了套装酥梨黄粉虫发生的原因，提出了黄粉虫的综合治理措施。
We don't know exactly why the pain occurs, but it can be very debilitating — to the point that patients decide to stop taking aromatase inhibitors.
我们不知道疼痛发生的准确原因，但是这种疼痛使人变得很虚弱，以至于患者会决定停止服用芳香化酶抑制剂。
In other words, an event consumer doesn't care where or why an event occurs; rather, it's concerned that it will be invoked when the event has occurred.
也就是说，事件消费者不关心事件发生的地点或原因；而是关注事件发生后它（消费者）将被调用。
"It is difficult to know why this relationship occurs - for example, stress, genes - so more work needs to be conducted on the exact mechanism underlying it," he said.
“很难理解为什么会发生这样的联系——也许是压力，基因——所以目前尚有大量的工作需要处理以找出准确的深层机制，”他认为。
But for now let's simply say that we have a diffraction which we know occurs only by wave-like behavior and it involves the use of x-rays. Why x-rays?
但现在让我们来简单假设一下，我们知道，只波才发生衍射，而且衍射涉及了X光的使用，为什么是X光？
Why not give it a try when the next conflict occurs?
所以下次当冲突发生的时候，不妨试试吧。
The researchers don't yet know how or why choice blindness occurs, but they think it gets to the very heart of how we make decisions.
研究人员目前尚不明确为什么会发生“选择失明”，同时也不清楚它是如何发生的。
Porosity is often found when using low-hydrogen electrodes such as E-7018, and it may be difficult to establish why this occurs.
孔隙度是经常发现在使用低氢焊条例如e- 7018，它可能会难以确定为什么发生这种情况。
It focuses on how collective action dilemma occurs, why it happened, and how to overcome the dilemma.
集体行动研究，主要讨论集体行动困境怎样发生、为什么发生，以及如何克服集体行动困境等问题。
It explains why we carefully study the exchange of value that occurs when sharing happens: What is the value for the person who shares?
所以我们会仔细研究分享行为中价值的交流：对分享者来说有什么价值？
Therefore, such logical connection is often found between two sentences: one sentence describing the occurrence; while the other explaining why or how it occurs, or what consequence it brings about.
因此，两个句子之间常常存在着这样的逻辑联系：一个句子描述事情的发生，而另一句则说明事情产生的原因或过程，或说明带来的结果。
Therefore, such logical connection is often found between two sentences: one sentence describing the occurrence; while the other explaining why or how it occurs, or what consequence it brings about.
因此，两个句子之间常常存在着这样的逻辑联系：一个句子描述事情的发生，而另一句则说明事情产生的原因或过程，或说明带来的结果。
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