And here, the idea is not that my weight gain is causing your weight gain, nor that I preferentially form a tie with you because you and I share the same body size, but rather that we share a common exposure to something, like a health club that makes us both lose weight at the same time.
这意味着我的增肥 并没有直接导致你体重增加， 我也不是因为咱俩身形相似 才和你建立关系， 而是因为我们俩都接触到了相同的经历， 比如说健康俱乐部， 导致我们俩同时减肥。