They can do only so much to represent the full complexity of the global climate and hence may give only limited information about natural variability.
关于全球气候的复杂性他们也只能呈现这么多，因此得到关于自然变化性的信息是有限的。
But the usual causes of natural variability do not seem to explain the current trend, so scientists incline to the view that it is man-made.
但通常的自然变异原因似乎解释不了目前的趋势，所以，科学家倾向于认为这是人为的。
Timmermann suspects the actual changes in sea surface temperature are due to natural variability in the ocean that canceled out the human-caused changes predicted by the models.
Timmermann怀疑海面温度的实际变化是由于海洋的自然变化，它掩盖了根据模型预测出的人为造成的变化。
There is more than enough natural variability in nature to mask a direct connection, they say.
他们表示，自然界里有着太多的自然变异使其直接联系不易被察觉。
To understand a pattern in natural variability, you can't look into the sky; you have got to study data.
你不能靠察看天象来了解自然变化的模式，你必须得研究数据。
Study finds only 30% of radical loss of summer sea ice is due to natural variability in Atlantic – and it will probably get worse.
研究发现，北极海冰夏季大面积融化可能会进一步加剧，而这其中只有30%由大西洋的自然环境变化所造成。
As to the role of man, the report says greenhouse gases are likely to have caused recent warming, but for the next few decades our influence will be relatively small compared to natural variability.
在人所发挥的角色上，报告表示，温室气体最近可能引起气温变暖，但未来数十年，相对于自然变化来说，人类的影响还是相对小的。
Natural variability has increased the difficulty of calculating the spill's effects.
自然可变性也增加了计算溢油事故影响的难度。
Natural variability has increased the difficulty of calculating the spill's effects.
自然可变性也增加了计算溢油事故影响的难度。
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