How does one become the last speaker of a language , as boa sr was before her death in 2010 ?
为何一个人会成为一门语言的最后的使用者，就像boasr在2010年死去之前那样？
After ten years of painstaking crossbreeding , he isolated a gene , sr31 ( sr for stem rust ) that resisted p. graminis .
经过十年痛苦的杂交培育，他分离出了抵抗小麦锈病sr31（sr指茎锈病）基因。
Towards the end of his life obama sr had spent most of his savings .
在走向人生终点的过程中，老obama花掉了他大部分的积蓄。
The test involved a system known as substitutional reality ( sr ) which has been developed at the riken brain science institute 's laboratory for adaptive intelligence in japan .
