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It might be a bit hard to visualize in your head where the cursor is moving, but we can easily slow it down and add more sleeps to make the code show us:
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新时代以来，党中央坚持把科技创新摆在国家发展全局的核心位置，每一次战略部署都抢占了未来发展的先机、踩在了时代的鼓点上。英国学者马丁·雅克认为，“在新一轮科技革命和产业变革中，中国走在前列。”
Most userland implementations of custom ReadableStream instances do not typically bother with all the ceremony required to correctly implement both default and BYOB read support in a single stream – and for good reason. It's difficult to get right and most of the time consuming code is typically going to fallback on the default read path. The example below shows what a "correct" implementation would need to do. It's big, complex, and error prone, and not a level of complexity that the typical developer really wants to have to deal with: