revolving door
Longman Dictionary of Contemporary English 5++LDOCE 5++ldoce_284_areˌvolving ˈdoor noun 1. TB[countable] a type of door in the entrance of a large building, which goes around and around as people go through it 旋转门2 [singular] used to say that the people involved in a situation, organization etc change often 频繁的人员流动 The park director position has been a revolving door for seven appointees. 公园主管一职已经接连换了七个人。3 
[singular] used to say that people return to a situation, position etc often, but usually for a different reason 旋转门〔用于表示常常有人出于另外的原因而回到某种情形或某个位置〕 This could mean that we end up with a revolving door Congress, in which former members return as lobbyists. 这可能意味着我们的国会最后成了一道旋转门，前任议员再度返回，摇身一变成了说客。
[singular] used to say that people return to a situation, position etc often, but usually for a different reason 旋转门〔用于表示常常有人出于另外的原因而回到某种情形或某个位置〕 This could mean that we end up with a revolving door Congress, in which former members return as lobbyists. 这可能意味着我们的国会最后成了一道旋转门，前任议员再度返回，摇身一变成了说客。Examples from the Corpus
revolving door• Term limits could mean that we end up with a revolving door Congress, in which former members return as lobbyists.• Under Treadwell, the Drifters were hired hands to be ushered in and out of his revolving door.• She joins a government-media revolving door.• She walked through the revolving door into the lobby.• The revolving door between government and think-tanks is well-established.• The revolving door has begun to rotate.reˌvolving ˈdoor nounChineseSyllable
Corpus of entrance a in the door type
revolving door
reˌvolving ˈdoor
noun
1. [countable] a type of door in the entrance of a large building, which goes around and around as people go through it
2. [singular] used to say that the people involved in a situation, organization etc change often:
The park director position has been a revolving door for seven appointees.
3. [singular] used to say that people return to a situation, position etc often, but usually for a different reason:
This could mean that we end up with a revolving door Congress, in which former members return as lobbyists.
reˌvolving ˈdoor
noun1. [countable] a type of door in the entrance of a large building, which goes around and around as people go through it
2. [singular] used to say that the people involved in a situation, organization etc change often:
3. [singular] used to say that people return to a situation, position etc often, but usually for a different reason: