adj.任性的，固执的，故意的，存心的
Can student willfully select the course?
学生可以随意选择课程 吗 ?
Cubism was hard to read, willfully ambiguous , and yet demotic too.
立体派很难理解, 恣意地前后矛盾, 然而它却通俗.
He will never set you at defiance or willfully injure you.
他决不会违抗你,或者存心伤害你.
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