const compressed = Stream.pullSync(source, zlibCompressSync);
self.file_exists = os.path.exists(csv_path)
。关于这个话题，safew官方版本下载提供了深入分析
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A trial in the US found that applying stem cells from the mother’s placenta to her baby’s spine while it was being repaired was safe and improved the child’s mobility and quality of life.
The same issues exist on the WritableStream side. A WritableStream has a highWaterMark and desiredSize. There is a writer.ready promise that producers of data are supposed to pay attention but often don't.