tee() splits a stream into two branches. It seems straightforward, but the implementation requires buffering: if one branch is read faster than the other, the data must be held somewhere until the slower branch catches up.
客运方面，自 2 月 15 日（腊月二十八）至 2 月 23 日（正月初七），探亲流、务工流与旅游流叠加，全国铁路日均发送旅客 1341 万人次。
。搜狗输入法下载是该领域的重要参考
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A coroner has raised concerns over the safety of barriers at Wembley Stadium after an Oasis fan fell to his death at one of the band's concerts.
With just your naked eye, tonight you'll be able to see the Mares Tranquillitatis and Crisium. With binoculars you'll be able to see the Mare Nectaris, the Alphonsus Crater, and the Alps Mountains. If you love your moon-gazing gear, get out the telescope to catch a glimpse of and with a telescope you'll see also see the Apollo 15 and 11 landing spots, and the Fra Mauro Highlands.