A person who has a few irons in the fire has a number of things working to their advantage at the same time-这是美国谚语词典直接查出来的意思。
irons in the fire指的就是在同一时间里出现的很多选择（可能性）或者工作，泛指就是有很多机会同时出现。
e.g.
He said: "I've got several irons in the fire and I've been surprised by the calls I've had.