有形的奖赏可以训练和鼓励自律，并杜绝不良习惯。
Tangible rewards can teach and encourage self-discipline and end bad behaviour.
有时候它们会偶然地在池底游动，然而在其他时间里它们被训练者指导，并且在它们快速游动时会得到奖赏。
Sometimes they swam around their tanks casually, whereas at other times they were directed and rewarded by their trainers to swim at their fastest.
对运动的兴趣和喜好是运动训练的内在奖赏机制。
Interest in sports and sports training preference is intrinsic reward mechanism.
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