The lack of information about other possible factors affecting globalclimate does not make them unimportant.
缺乏其他可能影响全球气候的因素的信息，并不意味着它们不重要。
2
They can do only so much to represent the full complexity of the globalclimate 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。
3
In addition to the internal variability of the globalclimate system itself, there is the added factor of external influences, such as volcanoes and solar activity.