depressed的时候应该去运动。看你们这么说,我再看看window外面的阴阴沉沉的天气,顿时没觉得那么depressed了
冷战时期,从1945 到 1963年,在大气中(open-air)进行了400多次核爆炸试验。Physicists and military engineers used the tests to study bomb types, sizes and destructive effects. Government leaders used nuclear tests as a diplomatic tool, flexing military muscle without conducting an attack.
As it became clear that nuclear fallout from the explosions was reaching civilian populations, the major world powers entered into arms-control negotiations that led to the1963 Limited Test Ban Treaty
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我这不是跟着你后面帮你promote你的idea嘛,咋就在你眼里变傻了?偶上下班单程都要20多分钟,而且是走路,这不就是怕累计嘛。每天十来分钟,一年下来有600多个小时,不吓人吗?我们还要再推荐这个idea嚒?你傻啊? 不管是放射物质还是花粉毒素,从安全到感觉不适到致病,是有一个累积效应和阀值的,比如辐射在人体累计有一个阀值,超过后就会导致人体器官不可恢复的损害,当年渥太华附近的核反应堆事故,处理人员只能干几分钟然后必须换人。开车上班路上也就那10来分钟而已。移民来这里的人也不是一到这里就得过敏症,是需要好几年的累计后才致病的。