They're systemic, they are deeply embedded in a community, in the workplace, in a team, even in dyadic interpersonal relationships.

它们是统性，它们深深植根于社区、工作场所、团队中，甚至在人际关中。

And I've talked to researchers and they have very much admitted this, and I think part of it is: it is harder to study when it's not a kind of clear dyadic relationship in the way that you would with a spouse.

我和研究人员谈过，他们非常承认这一点，我认为部分原因是：当友谊不像你和配偶那样是一种明确关时，研究起来会更困难。