查看人们在见面时尝试与他人建立联系点的方式。看看您本能地尝试确定您第一次认识的人是否认识您认识的人的方式。
(Look at the way people try to make points of contact with others when they meet. Look at the way you instinctively try to establish whether somebody you meet for the first time knows somebody you know.)