（四）伪造、变造或者倒卖车票、船票、航空客票、文艺演出票、体育比赛入场券或者其他有价票证、凭证的；
The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
，更多细节参见同城约会
PRIMARY KEY (repo_id, oid)
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The broadcast generated global headlines and much commentary on what happened and and how it could have been prevented.