n. 1 [U] a way of training sb. so that they learn to control their behavior and obey rules 训练;管教 2 [U] the ability to control your own behavior, so that you do what you are expected to do 自制力 3 [C] an area of knowledge or teaching, esp. one such as history, chemistry, mathematics, etc. that is studied at a university (尤指大学的)专业,科目