做一件好事，完成一件有贡献的工作之后的满足感，却会使人自然乐的其中。The satisfaction of doing a good thing and completing a contributing job will make people enjoy it naturally.
手心忽然长出纠缠的曲线，懂事之前，情动以后，长不过一天。Palm suddenly grow entangled curve, before sensible, after emotional, long but a day.
