fire in your belly不是指“有团火在你肚子里”，其正确的含义是志向，热情；雄心壮志；动力。

【例句】
I'm confident that Bill will get them to listen to our pitch—he has such a fire in the belly for this sort of work.
我很自信比尔能让他们听我们的推销，他在这种工作上很有雄心壮志。

Ian has played with fire in his belly throughout his career.
伊恩在他的整个职业生涯都很有动力。