This sighting occurred during my dive to a sunken wreck off Sardinia.
这次亲眼所见发生在我向撒丁岛外一艘沉船潜水的期间。
Both of these scenarios imply that specialization to each niche occurred only once.
这两套不同的理论都意味着，适应不同的栖息地生活环境的这一过程只发生了一次。
Twenge and her colleagues wanted to understand why this change in average wellbeing occurred.
特温格和她的同事们想要了解为什么平均幸福感会发生这样的变化。
The pictures are timed at 9:05 am last Saturday, just half an hour before the robbery occurred.
这些照片是在上周六上午9点05分拍的，就在抢劫发生半小时前。
In the last decade, a revolution has occurred in the way that scientists think about the brain.
过去十年，科学家对于大脑的思考方式发生了巨大的改变。
Shrub expansion has occurred in other environments, like semiarid grassland, and tall grass prairies.
灌木的扩张也发生在其他环境中，比如半干旱草原和高草草原。
I can't remember when the turning point occurred, but it might be a summer morning when I was in New York.
我不记得这个转折点是在什么时候发生的，但有可能是在纽约的一个夏天的早晨。
Even though a lot of the actions that occurred are pretty fantastic, so you'd never think of it as realistic.
尽管这其中很多行为都是幻想出来的，所以你永远不会认为它会在现实中发生。
However, similar changes occurred when the subjects were asked simply to open their mouths or to breathe deeply.
然而，受试者仅仅被要求张嘴或深呼吸时，也有类似的变化发生。
About a week later, Mr. Candidate asked to see Mrs. Sesemann, to tell her of something unusual that had occurred.
大约一周后，凯迪达特先生要求见赛赛曼夫人，告诉她发生了一件不寻常的事。
The split between humans and living apes is thought by some scholars to have occurred 15 to 20 million years ago.
一些学者认为人类和猿的分化出现在一千五百万到两千万年前。
If smallpox occurred in your community, about 30 percent of the people that acquire the disease would die from it.
如果天花发生在你的社区，大约百分之三十得了此病的人会因此死亡。
NATO later admitted it had been testing new sonar technology in the same area at the time as the strandings had occurred.
北大西洋公约组织后来承认，在搁浅发生时，他们正在同一海域测试新的声纳技术。
Other adaptations occurred later in the transition to terrestrial life and now wide spread but not universal among plants.
其他的适应机制在向陆地过渡过程中出现得较晚，现在在很多植物上得以呈现，但并不是所有的植物都如此。
The accident occurred at about 11:30 am local time at the mouth of the Manila Bay shortly after the ferry left Manila's port.
事故发生在当地时间上午11时30分左右的马尼拉湾入海口，当时渡轮刚刚离开马尼拉港口。
The difference in regular red-wine consumption has been narrowing, but no similar convergence in heart-disease rates has occurred.
在定期饮用红酒方面的差异正在缩小，但在心脏病发病率方面没有出现类似的趋同现象。
It was apparent that the glaciation occurred in the relatively recent past because the drift was soft, like freshly deposited sediment.
很明显冰川作用就发生在相对不远的过去，因为漂流物很软，像新鲜的沉积物。
The last time a major earthquake occurred along the Cascadia fault was in 1700, so officials worry that another event could occur any time.
上一次沿着卡斯卡迪亚断层发生的大地震是在1700年，所以官员们担心另一场大地震随时可能发生。
The mishap occurred when the single-engine aircraft was caught by a gust of wind while hovering a few feet above the ground before landing.
事故发生时，这架单引擎飞机正在离地几英尺的空中悬停准备降落，此时遇到了阵风。
Glaciation, Young claims, has occurred throughout Earth's history, and there is evidence that it occurred toward the end off the Permian period.
杨说，冰川作用在地球的整个发展历史中都有发生，有证据表明它发生在二叠纪末期。
The Ethiopian statement says that there is "no definitive explanation" for the crash near the Lebanese capital, which occurred during stormy weather.
埃塞俄比亚声明中说，对发生在黎巴嫩首都附近的坠机事件“没有明确的解释”。
During this relatively short period of time, greater changes in people's living conditions have occurred than in the thousands of years which preceded.
在这相对短暂的时间里，人们的生活条件发生了比之前几千年更大的变化。
First, the observation may be unreliable in that two or more observers may not agree that the particular response occurred, or to what degree it occurred.
首先，观察结果可能会不可靠，因为两个及以上的观察者可能无法对特定的具体反应是否发生以及反应发生的程度达成一致意见。
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