Solar storms aimed at Earth come in three stages, not all of which occur in any given storm.
扑向地球的太阳风暴分三个阶段，但并不是所有的阶段都发生在特定的风暴中。
It is at the boundaries between plates that most of Earth's volcanism and earthquake activities occur.
地球上大部分的火山活动和地震活动发生在板块之间的边界处。
They occur primarily in regions of recent volcanic activity as hot, dry rock; natural hot water; or natural steam.
地热能主要以干热的岩石、自然热水或自然蒸汽的形式出现在近期火山活动的区域。
To argue for a cause-and-effect relationship, scientists must attempt to explain why and how a connection could occur.
想要证明因果关系，科学家们必须尽量解释这种联系可能出现的原因和方式。
Finally, the good reader has at his command several special skills which he can apply to reading problems as they occur.
最后，优秀的读者掌握了几种特殊的技巧，当出现阅读问题时，他可以运用这些技巧。
Strokes and heart attacks occur when blockages in the arteries supplying the brain or heart muscles cut off the supply of blood to tissues.
当供应大脑或心脏肌肉的动脉阻塞，进而切断组织血液供应时，就会出现中风和心脏病发作的情况。
Data has since revealed that all mass strandings around Australia occur on gently sloping sandy beaches, some with inclines of less than 0.5%.
此后的数据显示，澳大利亚周围所有的大规模搁浅都发生在平缓倾斜的沙质海滩上，有些海滩的倾斜度小于0.5%。
Such a unique view can only occur during those few seconds where the existing moonlight balances with the almost unseen first rays of sunlight.
这种独特的景象只出现在那几秒之内，在那几秒内，原有的月光和几乎看不见的第一缕阳光相平衡。
The predictions of quantum mechanics, however, give only the probability of an event, not a deterministic statement of whether or not the event will occur.
然而，量子力学的预测只给出事件发生的概率，而不是事件是否会发生的确定性陈述。
Most volcanoes that occur in the interiors of plates are believed to be produced by mantle plumes, columns of molten rock that rise from deep within the mantle.
人们认为，大多数发生在板块内部的火山爆发都是由地幔柱造成的，地幔柱是指从地幔深处涌出的熔岩柱体。
The brain is as active during REM (rapid eye movement) sleep when most vivid dreams occur as it is when fully awake, says Dr. Eric Nofzinger at the University of Pittsburgh.
匹兹堡大学的艾瑞克·诺夫辛格博士说，大脑在快速眼动睡眠期和完全清醒时一样活跃，大多数最生动的梦都发生在这个时候。
Friendships are not made in a day, and the computer would be more acceptable as a friend if it imitated the gradual changes that occur when one person is getting to know another.
友谊不是一天就能建立起来的，如果电脑能模仿一个人逐渐了解另一个人时发生的变化，那么作为朋友它会更容易被接受。
Friendships are not made in a day, and the computer would be more acceptable as a friend if it simulated the gradual changes that occur when one person is getting to know another.
友谊不是一天建立起来的，如果电脑能模拟出一个人认识另一个人的过程中所发生的渐进变化，那么它将更容易被人们接受为朋友。
Researchers have established that when people are mentally engaged, biochemical changes occur in the brain that allow it to act more effectively in cognitive areas such as attention and memory.
研究人员已经证实，当人们动脑筋时，大脑中会发生生化变化，使其在注意力和记忆等认知区域更有效地发挥作用。
This technique is particularly successful where problems occur as the result of repetitive movements.
这项技术的成功之处在于能解决重复运动引起的问题。
If any bright thoughts occur to you pass them straight to me. Have you got any?
如果你想到某个好主意就直接告诉我。你有什么好主意吗？
Furthermore, the legal system and the events which occur within it are primary subjects for journalists.
此外，法律制度和与其密切相关的事件是新闻记者报道的重要主题。
Not once did it occur to Michael that he could one day become a top student in his class.
迈克尔一次也没有想过有一天他会成为班里的尖子生。
That such deep events do occur has been accepted only since 1927 when the seismologist Kiyoo Wadati convincingly demonstrated their existence.
直到1927年地震学家KiyooWadati证明了这种深度地震的存在，人们才承认这种现象确实存在。
Certainly there are memory consolidation processes that occur across periods of wakefulness, some of which neither depend on nor are enhanced by sleep.
当然，在清醒状态下也有记忆巩固的过程，其中一些既不依赖睡眠，也不被睡眠增强。
Paradoxically, while the temperatures required for liquid water exist only in the inner solar system, the key building blocks of life, including water itself, occur primarily beyond the asteroid belt.
矛盾的是，虽然液态水所需的温度只存在于太阳系内部，但生命的关键组成部分，包括水本身，却主要存在于小行星带之外。
This makes it easy for transactions to occur between businesses.
这使企业之间的业务交易变得更加方便。
If any of the following errors occur, you can resolve them easily yourself.
如果出现下面任何一个错误，您可以自己轻松地进行处理。
When problems occur, no one is picking on you and you can't excuse it as bad luck.
当问题发生时，没有人怪罪于你，你也不能以运气不好作为借口。
Jot down questions which occur while you're reading, or any new ideas or insights.
记下阅读中碰到的问题，或者任何新想法或思考。
Falling in love happens differently between cultures but it does occur in most cultures.
在不同的文化体系中，恋爱虽然不太一样，但确都存在。
These features ensure that data remains available regardless of problems that may occur.
这些功能可以确保无论出现什么问题，数据都能保持可用性。
This relieves you of manually handling exceptions that occur during an asynchronous call.
这能让您不用再手工处理异步调用过程中发生的异常。
This relieves you of manually handling exceptions that occur during an asynchronous call.
这能让您不用再手工处理异步调用过程中发生的异常。
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