Трамп сделал дерзкое заявление о капитуляции Ирана01:27
Firefighters in Sicily have rescued about 400 rare books from a library in Niscemi that hangs on the edge of a mudflow, after a devastating landslide in January tore away an entire slope of the town and carved a 4km chasm.
,这一点在新收录的资料中也有详细论述
▲ 滚轮和拨片,图源:The Verge
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And though most scientists hail vaccines as one of public health’s greatest achievements, they have provoked fear, distrust, and contentious resistance since Edward Jenner invented the first vaccine, to prevent smallpox, in the late 1700s.