make up one's mind; iron core
Meanings
2 senses · 6 examplesverb
to make up one's mind; to be determined; to steel oneself
Often used in the form '铁了心' (tiě le xīn) to emphasize that a decision is final and unwavering. The structure frequently takes an object or complement indicating the course of action.
This time he has really made up his mind.
He is determined to support the frontier, aspiring to work in the west for ten years.
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No matter how her family objected, she was determined to marry that man.
The boss has made up his mind to lay off staff; it is useless for us to try to persuade him otherwise.
noun
iron core; magnetic core; laminated core
technicalRefers specifically to the ferromagnetic core in electrical devices such as transformers, inductors, and motors, used to concentrate magnetic flux.
The iron core loss of this transformer is very small.
Silicon steel sheets are commonly used materials for making magnetic cores.