The study is in the journal Climatic Change.

这一研究结果发表在《气候变化》期刊上。

34 But no one understood the reason for such sharp climatic changes.

但是没有人知道气候变化如此剧烈的原因。

Big animals, like Allosaurus and Ceratosaurus, are the first to suffer during a dramatic climatic change.

像异特龙和角鼻龙这样的庞然大物，在剧烈的气候变化下首当其冲。

For instance, volcanic activity is one mechanism that might affect climatic change.

例如，火山活动是一种可能影响气候变化的机制。

But first, let's back up a moment and review what we know about climatic change in general.

但首先，让我们回顾一下我们对气候变化的总体了解。

There have been a lot of climatic changes during that time, and very few of them have occurred at this rate.

在那段时间里发生了很多气候变化，而且很少有以这种速度发生的。

We see things that happen on these other planets, with tremendous climatic changes in the past that have happened in a very short period of time, and that could happen on the Earth.

我们观察其他行星上发生的一切，过去的恐怖、可怕的变化发生于某个时期也可能发生于地球上。

The UN International Panel on Climatic Change now says that COz-levels could double within 40-years if present rates of fossil fuel burning and deforestation continue.

联合国气候变化国际委员会目前说，如果矿物燃料燃烧和森林滥伐以目前的速度继续发展的话，40年内二氧化碳含量将会翻番。

Technology is helping to protect the future of coffee such as 'breeding' the Arabica bean plants to increase its diversity and making it resistant to climatic changes.

技术正在帮助保护咖啡的未来， 例如“培育” 阿拉比卡咖啡豆植物以增加其多样性并使其能够抵抗气候变化。

They knew that the so-called " little ice age" , a series of cold snaps between, roughly, 1350 and 1850, had brought not only drought and famine, but also war – and so could these new climatic changes.

他们知道，所谓的“小冰期”，即大约在1350年至1850年之间的一系列寒流，不仅带来了干旱和饥荒，而且还带来了战争--这些新的气候变化也会带来战争。

The system is so complex that, to date, our best computer models are only crude approximations --- and are not sophisticated enough to test hypotheses about the causes of climatic change.

该系统是如此复​​杂，以至于迄今为止，我们最好的计算机模型只是粗略的近似值——而且还不够复杂，无法检验关于气候变化原因的假设。

But, in the meantime, eliminating all this complicated question of climatic change, the plain fact remains that the present rain and snowfall is abundantly sufficient for the luxuriant growth of sequoia forests.

但是，与此同时，撇开所有这些复杂的气候变化问题，显而易见的事实仍然是，目前的雨雪足以让红杉林茂盛生长。

The climatic changes in progress in the Sierra, bearing on the tenure of tree life, are entirely misapprehended, especially as to the time and the means employed by Nature in effecting them.

塞拉利昂的气候变化与树木生命的保有权有关，但人们完全误解了，尤其是在时间和自然影响这些变化的手段方面。

Harris explains that if we have some idea of how life changes when we have changes in climate, then we perhaps can take precautions when we're actually undergoing the same climatic changes ourselves.

哈里斯解释说， 如果我们对气候变化时生活会发生怎样的变化有所了解， 那么当我们自己实际经历同样的气候变化时， 我们或许可以采取预防措施。

Harris is saying that we may be able to take precautions when we are " undergoing, " or experiencing, climatic changes ourselves, much like the plants and animals did so very long ago at the La Brea Tar Pits.

哈里斯说，当我们自己“经历”或经历气候变化时，我们可以采取预防措施，就像很久以前在拉布雷亚沥青坑的植物和动物所做的那样。