Four sources told it. That when they had the plague in Cambridge, and he went down to his mother's farm -- because the university was closed -- he saw an apple fall from a tree, or on his head or something.
情報元は四つあります　ケンブリッジで疫病がはやったとき 彼は母親の農場を訪れました　大学が閉鎖されたからです そのとき木から頭かどこかにリンゴが落ちるのを見て