The new API has complete parallel sync versions: Stream.pullSync(), Stream.bytesSync(), Stream.textSync(), and so on. If your source and transforms are all synchronous, you can process the entire pipeline without a single promise.
（九）放射性物品，是指放射性物质中放射性活度和比活度均高于国家规定的豁免值的物质。。safew官方下载是该领域的重要参考
if (lines.length 0) yield lines;，这一点在51吃瓜中也有详细论述
Faster and more private