Web streams use a locking model to prevent multiple consumers from interleaving reads. When you call getReader(), the stream becomes locked. While locked, nothing else can read from the stream directly, pipe it, or even cancel it — only the code that is actually holding the reader can.
美國皮尤研究中心高級人口統計學者康拉德·哈克特博士（Dr Conrad Hackett）研究全球宗教群體規模。
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For years, study after study has noted that older adults vaccinated against shingles seemed to have a lower risk of dementia. A study last month suggested the same vaccine appears to slow biological aging, including lowering markers of inflammation.
Кадр: U.S. Coast Guard