One hypothesis is that it's a natural phenomenon, that the starfish naturally undergo population fluctuations following particularly good spawning years.
有一种假说认为，这是一种自然现象；在特别适合产卵的那几年后，刺冠海星自然会经历种群数量的波动。
What's the Deadliest Natural Phenomenon?
最致命的自然现象是什么？
Diagram 15 shows a natural phenomenon.
图15显示一个自然现象。
It is a natural phenomenon. It needs some outlet.
它是个自然现象，需要某个出口。
On the surface, Southwest drought is a natural phenomenon.
从表面上看，西南旱灾是一种自然现象。
Yeah, this season is a natural phenomenon leaves, who CARES that a marginal leaf too!
是呀在这季节落叶是自然现象，谁又管它这一片无足轻重的叶子呢！
Water flow, there is a low-lying land can form a pool, which is a natural phenomenon.
水流，有一个低洼的土地能够形成一个水池，这是一种自然现象。
We must learn to view change as a natural phenomenon - to anticipate it and to plan for it.
不妨把变化看作一种自然现象，学会感知它，计划它。
Fog is a natural phenomenon. It usually appears in the morning, so people call it morning fog.
雾是一种自然现象，它通常出现在早晨，因此人们叫它晨雾。
It appears in history less as a conventional nation-state than as a permanent natural phenomenon.
在历史长河中它更象一个永恒的自然现象而不是一个传统的民族国家。
Another haunted and related natural phenomenon is known as frequency infrasonic sound waves.
另一种与闹鬼相关的自然现象是称作次声的低频声波。
Movement of soil particles from one place to another by wind and water is a natural phenomenon.
运动的土壤颗粒从一个地方到另一个地方利用风和水是一种自然现象。
Life is the most enigmatical natural phenomenon, and dream is the most stirring life of the mind.
生命，最不可思议的自然现象；梦想，最激动人心的精神殿堂。
The 'flowery desert' is a natural phenomenon in which flowers of great diversity appear in July and August.
这片“鲜花沙漠”是一种自然现象，每年的七、八月份，多种多样的鲜花都会在这里盛开。
It never occurred to me just how special this natural phenomenon was until we were living in Australia.
我从来没有想过这个自然现象会有多特别，直到我去澳大利亚生活了一段时间我才意识到。
This is the growth and development of a natural phenomenon, as the children grew older, will gradually disappear.
这是生长发育的一个自然现象，随着儿童年龄的增长，会逐渐消失。
So we don't comment on natural phenomenon of the law of jungle according to our moral criterion of kindness and incumbency.
所以，我们也不能用我们自己订下的仁义行为标准，去评论弱肉强食的自然现象。
In fact, Bonis thinks calling the Guatemala City chasm a sinkhole is a misnomer-a true sinkhole is an entirely natural phenomenon.
事实上，博尼斯认为将危地马拉城深坑称作灰岩坑(sinkhole)是用词不当——真正的灰岩坑是一种纯自然现象。
Google has marked today's lunar eclipse with a special 'doodle' and live video stream to show the progress of the natural phenomenon.
为了纪念今天的月全食，谷歌推出了一个特别的“涂鸦”，用实时视频流展示了这一自然景观的全过程。
The child's mind can not imagine what life living things, can be a very natural phenomenon, imagine a beautiful but strange things.
孩子的心可以把没有生命的东西想象成有生命的东西，可以把一件很自然的现象想象成美好而又不可思议的东西。
Geological disaster is a type of natural calamities, which is not only a natural phenomenon but also a social economical phenomenon.
地质灾害是自然灾害中的一个重要类型，它既是一种自然现象，也是一种社会经济现象。
Earthquake is the shake of earth's surface, like wind, rain, lightning, debris flow, volcano's eruption, which is a natural phenomenon.
地震是地球表面的振动，这就像风、雨和闪电、泥石流、火山爆发一样，目前地球上经常发生的一种自然现象。
Such as the "first rain in 2010," the rain is to describe this natural phenomenon, but quite true, naturally, linked up with the community.
如《2010年的第一场雨》本是描述下雨这一自然现象，但笔锋一转，自然就与社会联系起来了。
Dust storms are a natural phenomenon, but are influenced by human activities and are now just as serious as traffic and industrial air pollution.
沙尘暴是一种自然现象，但是受到了人类活动的影响，现在和交通和工业空气污染一样严重。
Dust storms are a natural phenomenon, but are influenced by human activities and are now just as serious as traffic and industrial air pollution.
沙尘暴是一种自然现象，但是受到了人类活动的影响，现在和交通和工业空气污染一样严重。
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