reversal

1. N-COUNT A reversal of a process, policy, or trend is a complete change in it. 徹底改變; 逆轉

The paper says the move represents a complete reversal of previous U.S. policy. 報上說這一舉動反映了之前美國政策的徹底逆轉。

2. N-COUNT When there is a role reversal or a reversal of roles, two people or groups exchange their positions or functions. (位置或功能的) 轉變

When children end up taking care of their parents, it is a strange role reversal indeed. 當孩子們最終照看起父母來的時候，這確實是一個奇怪的角色轉變。