crasher

1.Given the distance between my previous role as a convention gate-crasher and my newfound role as convention keynoter, I had some cause to worry that my appearance in Boston might not go very well.

我大会角色是擅闯会场者，而这大会是主发言人，由于这两个角色巨大差距，我有一由担心，我波士顿登场也许不会十分成功。