坚决要做…，一心要做…
to be very determined to do or have something
Martha's dead set on having a new bike. 玛莎一心想要一辆新自行车。
Ethan is dead set on being an actor.
I'd like to travel around Europe this summer but Jacob is dead set on touring the U.S.
Her husband is dead set on expanding the business.
I don't think they should go ahead with the plan, but if they're dead set on it, there isn't much I can do.
See also: dead adjective adverb