Web streams has no synchronous path. Even if your source has data ready and your transform is a pure function, you still pay for promise creation and microtask scheduling on every operation. Promises are fantastic for cases in which waiting is actually necessary, but they aren't always necessary. The new API lets you stay in sync-land when that's what you need.
这架飞机正运送玻利维亚中央银行新印制的钞票，目的地是该国其他城市，飞机残骸破裂后，大量崭新钞票散落满地，如雨点般洒落在公路和田野上。
。WPS官方版本下载对此有专业解读
Третье правило — чемодан нужно собирать «слоями». В прохладных странах погода меняется быстрее, и одна куртка на все случаи жизни не всегда спасает. Поэтому важно положить вещи и на тепло, и на прохладную погоду.
"My grandson is devastated," he said, "but we've resigned ourselves to the fact that we've got to go".