我是意译的,不知可不可以……
译文如下：
The world became in silence,
we were learning to smile.(这里我本来想用practice,但是有失文雅,所以就改掉了)
Finally we changed to the ones who couldn't cry...
Goodbye,my best days in the past!（in the past是我加上的,因为我认为只有三个单词在格调上不美,而且加上也更加说明这几句话的感情）
不好请斧正!