Rattlesnakes occur in the warmer, drier parts of North America.
响尾蛇出现在北美温暖干燥的地区。
High levels of nitrate occur in the Midwest because of the heavy use of fertilizers.
因为大量使用化肥，中西部地区的硝酸盐含量很高。
Changes in the eccentricity of Earth's orbit occur in a cycle of about 96,000 years.
地球轨道偏心率的变化大约在96000年的一个周期内发生。
Why did the near extinction and migrations of wild animals occur?
为什么会发生野生动物濒临灭绝和迁徙的现象？
Today such gravitational compensation probably would not occur: the outer layer of the Moon is too cold and stiff.
今天这种引力补偿很有可能不会发生：月球的外层过于寒冷和坚硬。
They think that a new subduction zone might occur at the western edge of the Atlantic Ocean.
他们认为，一个新的俯冲带可能会出现在大西洋的西部边缘。
These studies suggest that choice blindness can occur in a wide variety of situations and can have serious implications for medical and judicial outcomes.
这些研究表明，“选择盲”这一病症可以发生在各种各样的情形下，并可能对医疗和司法结果产生严重影响。
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。
In 6% of cases, an inverse distribution may occur, with rash mostly on the extremities.
在6%的病例中，可能出现相反的分布，皮疹主要发生在四肢。
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。
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%。
Social learning in animals is said to occur when direct or indirect social interaction facilitates the acquisition of a novel behavior.
据说动物的社会学习是在直接或间接的社会互动促进获得新行为时发生的。
When 80% of all Australian whale strandings occur around Tasmania, Gales and her team must continue in the search for answers.
当澳大利亚80%的鲸鱼搁浅发生在塔斯马尼亚岛附近时，盖尔斯和她的团队必须继续寻找答案。
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 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。
The most heated arguments often occur between people on opposite ends of the spectrum, but the most frequent learning occurs from people who are nearby.
最激烈的争论往往发生在处于这个范围两端的人之间，但最频繁的学习则发生在处于附近区间的人身上。
Krech also contradicts Martin's exclusion of climatic change as an explanation by asserting that widespread climatic change did indeed occur at the end of the Pleistocene.
Krech断言广泛的气候变化确实发生在更新世末期，这与Martin排除气候变化作为解释的观点相矛盾。
For such reasons, we can assume that there must be an important random factor in neural development, and in particular, that errors must and do occur in the development of all normal brains.
基于这些原因，我们可以假设在神经发育过程中一定存在一个重要的随机因素，特别是在所有正常大脑的发育过程中确实也会发生错误。
Many species are similar enough that hybrid offspring are possible and may often occur in nature, but for the majority of species, this rule generally holds.
许多物种非常相似，因此有可能杂交繁衍出后代，而且这种情况可能经常在自然界中发生；但对于大多数物种来说，这一规则大体适用。
Even without such specific documentation, it is clear that impacts of this size do occur and that their results can be catastrophic.
即使没有这样具体的记录，这种规模的影响也很明显是确实会发生的，而其结果可能是灾难性的。
Deformation is more likely to occur the thicker the ice is, because of the gravity of the weight of the ice.
越厚的冰越容易发生变形，是由冰的重量产生的重力造成的。
In less-developed countries, such as those of sub-Saharan Africa and South-East Asia, wastage tends to occur primarily at the farmer-producer end of the supply chain.
在欠发达国家，如撒哈拉以南的非洲和东南亚国家，（食物）浪费往往主要发生在供应链的农民生产者端。
One of its purposes is to register for all notifications which occur on that cell, node, or server.
其目的之一就是注册该单元、节点或服务器上发生的所有通知。
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 headaches only occur at night, lack of fresh air and oxygen is often the cause.
如果头痛只发生在晚上，缺少新鲜空气和氧气常常是其原因。
It would be wonderful to observe a singularity and obtain direct evidence of the undoubtedly bizarre phenomena that occur near one.
如果能观察到一颗奇点，并获取关于奇点附近出现的可信的怪异现象的直接证据，那将非常好。
But the ones synthesized through abiotic processes, which is to say not involving microorganisms, occur in equal numbers of right- and left-handed.
但是通过非生物过程合成的，也就是不涉及微生物的那些，在右撇子和左撇子中数量是相等的。
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。
An episode of major depression may occur only once in a person's lifetime, but more often, it recurs throughout a person's life.
重度抑郁发作可能在一个人的一生中仅出现一次，但更经常的是，它在一个人的一生中反复出现。
Thousands of deaths and other casualties are expected if a 9.0 earthquake were to occur.
如果发生9.0级地震，预计将有数千人死亡和其他伤亡。
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