But pause for a moment to examine how exactly sentiment affects the economy, and the causal chain starts to look sketchier.

但请暂停片刻，看看情绪究竟是如何影响经济的，这时因果关系链就开始变得有些缺环少节了。

It has various stages of causal chain.

它具有因果链的各个阶段。

So let's say that is, actually, the causal chain.

所以我们可以说这实际上是因果链。

The researchers hope that future studies might further clarify the causal chain.

研究人员希望未来的研究能够进一步阐明因果关系。

Though the interconnectedness of the global climate means that some effects will inevitably be felt farther afield, the strength of the causal chain fades with distance from the tropics.

尽管全球气候的相互关联性意味着某些影响不可避免地会在更远的地方感受到，但因果链的强度会随着远离热带地区而减弱。