Who Made That? The Stop Sign Wasn’t Always Red(nytimes.com)4 ポイント·投稿者 four·15 年前·0 コメントnytimes.comWho Made That? The Stop Sign Wasn’t Always Redhttp://www.nytimes.com/2011/12/11/magazine/stop-sign.html0 コメントコメントを投稿—