// console.log(spanner.next(80)); // 输出1（正确）
In Web streams, creating a simple producer/consumer pair requires TransformStream, manual encoding, and careful lock management:
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1．报送时机：船舶进入上述区域前开始报送，船舶离开上述后取消报送。。im钱包官方下载对此有专业解读
const shared = Stream.share(source, {
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