Li Ya believes that both internal and external factors are at play.

李娅认为其中既有内部原因也有外部原因。

External and internal factors contributed to the failure of the team.

外部和内部因素导致了团队的失败。

Hunger is not only influenced by internal factors, but also external factors, and we can forget that we're hungry under some circumstances because we're distracted or that we're busy.

饥饿不仅受到内部因素的影响，也受到外部因素的影响，在某些情况下，我们会因为分心或忙碌而忘记自己饿了。