请问OG1中一句话的解释

tropicalfish

Synder et al  propose that caffeine, which is structurally similar to adenosine, is able to bind to both types of receptors, which prevents adenosine from attaching there and allows the neurons to fire more readily than they otherwise would.

此句中than后they是指代neurons吗? 如果是, 为什么用would 而不是do? 此句如何理解?

而今迈步从头越

than后的they指代neurons，这里would是虚拟语气的用法，所以不用do。

swlfx

ding.

tropicalfish

明白, 谢谢!