Bob Beamon legendary jump of 29-2 1/2 in Mexico was the longest-standing record in track and field until 1991 when Mike Powell made history in Tokyo with a 29-4 1/2 jump.是什么意思_Bob Beamon legendary jump of 29-2 1/2 in Mexico was the longest-standing record in track and field until 1991 when Mike Powell made history in Tokyo with a 29-4 1/2 jump.在线翻译_英语_读音_用法_例句