Hell Fast
resource tiering (such as Rare, Epic, Normal, etc.), the goal is to make students excited and proud when they unlock or gain certain skills. The tier system adds an element of rarity and achievement to each skill
Hell Fast
1. 不同的技能需要有不同的等级 2. 随机的奖励,随机的题目 随机性,差异性,实用性
Hell Fast
内容,就是比如说,之前学不了,现在可以学了,因为你的技能上来了