所以我们一直在讨论人类活动对气候影响的理论。

So we have been talking about theories that deal with the effects of human activity on the climate.

youdao

除了全球气候系统本身的内部变化之外，还有外部影响的附加因素，如火山和太阳活动。

In addition to the internal variability of the global climate system itself, there is the added factor of external influences, such as volcanoes and solar activity.

youdao

事实上，过去的气候变化模式表明，即使没有人类活动的影响，地球的气候几乎肯定会在未来经历剧烈的变化。

In fact, the pattern of climate change in the past reveals that Earth's climate will almost certainly go through dramatic changes in the future even without the influence of human activity.

youdao