名词
1. （过程、政策或趋势的）反转，倒转，逆转
A reversal of a process, policy, or trend is a complete change in it.
2. （角色的）交换，互换
When there is a role reversal or a reversal of roles, two people or groups exchange their positions or functions.
3. (通常涉及金钱损失的)失败，逆境，挫折
A reversal is a failure, usually involving the loss of money.
1. a major change in attitude or principle or point of view
e.g. an about-face on foreign policy
Synonym: about-facevolte-facepolicy change
2. a change from one state to the opposite state
e.g. there was a reversal of autonomic function
3. the act of reversing the order or place of
Synonym: transposition
4. turning in the opposite direction
Synonym: reversionreverseturnaboutturnaround
5. a judgment by a higher court that the judgment of a lower court was incorrect and should be set aside
6. a decision to reverse an earlier decision
Synonym: change of mindflip-flopturnaboutturnaround
7. turning in an opposite direction or position
e.g. the reversal of the image in the lens
Synonym: turn around
8. an unfortunate happening that hinders or impedes
something that is thwarting or frustrating