Paragraph SixChange is the most changeless thing in the universe. We need to accept all changes — welcome or unwelcome — with the understanding that nothing comes to stay, but only to pass. As two things can never occupy the same space at the same time, one change makes way for the next.Change is i_____.
【正确答案】：invariant
【题目解析】：本段的意思是：变化是永恒的、不变的。
