Certainly people are reflecting on the loss of a friend, a loss to our very tightly knit, but dwindling community.

人们无疑会反思一个朋友的离去，反思一个和我们关系非常密切却又逐渐减少的群体的损失。

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Geneticists have determined that this variation originated in the tightly knit Jewish community centuries ago, marking a carrier as a descendant of Jews.

FORBES: Jewish genes