历史上的6/20日
今天是6/20日，2023年的第171天，今年还剩194天。
人类历史上的今天,发生了如下值得我关注的事件：
美国大学第一位女博士学位，由康奈尔大学授予卡罗琳·威拉德·鲍德温（科学专业）。
1st female PhD from an American University, earned by Caroline Willard Baldwin (in Science) at Cornell University
——1963
美国与苏联建立核“热线”
为了减轻意外核战争的威胁，美国和苏联同意在两国之间建立一个“热线”通信机制。该协议是1962年10月古巴导弹危机后缓解美国和苏联之间紧张局势的一小步，这场导弹危机使两国处于核战争的边缘。
United States and Soviet Union agree to establish a nuclear “hot line”
To lessen the threat of an accidental nuclear war, the United States and the Soviet Union agree to establish a “hot line” communication system between the two nations. The agreement was a small step in reducing tensions between the United States and the USSR following the October 1962 Missile Crisis in Cuba, which had brought the two nations to the brink of nuclear war.
