content may vary depending on the source material and it is important to review
const writer = writable.getWriter();，更多细节参见WPS官方版本下载
arr[i] = rand() % (max - min + 1) + min;，详情可参考同城约会
Data flows left to right. Each stage reads input, does its work, writes output. There's no pipe reader to acquire, no controller lock to manage. If a downstream stage is slow, upstream stages naturally slow down as well. Backpressure is implicit in the model, not a separate mechanism to learn (or ignore).