Oh! Hi, Grandpa. Yes, of course, I am, but my mind isn't.
噢, 嗨, 爷爷。是的, 当然, 我准备好了, 但是有点心事。
The body's tissues are self-repairing and self-restoring to a degree, and function best when more or less continuously active.
人体组织在一定程度上有自我修补和自我恢复的能力,有张有弛地连续活动时,其功能最佳。