The design of Web streams predates async iteration in JavaScript. The for await...of syntax didn't land until ES2018, two years after the Streams Standard was initially finalized. This timing meant the API couldn't initially leverage what would eventually become the idiomatic way to consume asynchronous sequences in JavaScript. Instead, the spec introduced its own reader/writer acquisition model, and that decision rippled through every aspect of the API.
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供应商用液压切割机把书脊整齐切掉，散开的书页随即被送进高速工业扫描仪，扫完之后，剩下的纸张交给回收公司处理。一家参与报价的扫描服务商在提案中写道，Anthropic 希望在六个月内完成 50 万到 200 万册书的数字化工作。