make a resolution to do 决心;决定做某事
语义比 determine 强，指下定决心做某事，常有贯彻决定的坚定意志。
She made a resolution to visit her relatives more often.
她决定要多走走亲戚。
She made a resolution to study English harder at school.
她下定决心要在学校更加努力地学习英语。
She made a New Year's resolution to get fit.
她的新年决心是要保持身材健美。
They made a resolution to lose all the weight gained during the Christmas period.
他们下定决心要减去圣诞期间增加的体重。
We must make a resolution to study hard.
我们必须下定决心努力学习。
She resolved on another try next year after failing this year's entrance exam for postgraduate students.
她今年考研没成功，决定明年再考一次。
拓展：下决心做某事常见表达：
make a decision to do sth
make up one's mind to do sth.
determine on sth/to do sthdecided to do
be determined to do sth.
have a determination to do sth.
make a resolution to do sth.
resolve to do sth
resolve (on sth/on doing sth
make a (firm) resolve to do