relaxation of boundary condition

例句：

1. 1.After a long day at work, I need to relax and unwind.
   工作了一整天后，我需要放松和缓解压力。
2. 2. The patient was given medication for relaxation.
   病人被开了药用于放松。
3. 3. During the holiday, people often relax by going on vacation.
   假期里，人们经常通过度假来放松自己。