the quality of being relaxed, pleasant and friendly 轻松: 轻松,愉快和友好的品质Their easiness with each other was evident. 他们之间的轻松是显而易见的。
the quality of not being difficult; the ability to be done or obtained without a lot of effort or problems 易用性: 质量不难;无需大量努力或问题即可完成或获得的能力Students graded teachers on helpfulness, lesson clarity and the easiness of lessons. 学生们根据有用性、课程清晰度和课程难易程度给老师打分。