challengeable
/'tʃæləndʒəbl/something is capable of being disputed or challenged
adjective [原级] 挑战性的
I am good at the science subjects which are challengeable. 我的理科学得很好,我觉得这些科目比较具有挑战性。
I am good at the science subjects which are challengeable. 我的理科学得很好,我觉得这些科目比较具有挑战性。