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.
克林頓副幕僚長安赫爾・烏雷尼亞（Angel Ureña）向BBC表示：「克林頓總統對愛潑斯坦的罪行一無所知，也沒有任何東西需要隱瞞。」他說克林頓沒有寄出愛潑斯坦文件中的任何電子郵件。
，这一点在旺商聊官方下载中也有详细论述
"One minute on a Saturday she's playing with the dog, Sunday she's gone to work, Monday night she's in a coma."
Maggie 姐在新花都夜总会迎宾处前（图：南方人物周刊记者 方迎忠）