Craig hopes to go to gradu ate school .

克雷格希望去上研究生院。

The time when the haag of bj-1was first detected after inoculation was 34 days , with serial passages , the infectivity titer of bj-1increased gradually and the multiplication cycle shortened gradu ally to2-3days .

bj-1haag最初检出时间为34天，随着传代次数的增加，感染滴度逐渐增高，繁殖周期逐渐缩短至2～3天。