Now, the elements of the scene also communicate this to us, but you can read it straight off their faces, and if you compare their faces to normal faces, it would be a very subtle cue.
照片中的其他元素同样可以传递这样的信息， 但从他们脸上我们可以更直接地读出来， 如果你把这两张脸和一般的脸做对比， 你会发现，那些（能告诉他们在互动的）信息并不很明显