万维网是一名英国科学家于1991年发明创造的。
The World Wide Web was invented in 1991 by an English scientist.
在2007年发表在《普通内科医学杂志》上的一项研究中，研究人员询问了数百名医生一个50岁男性患者出现胸痛的假设情况。
In one study published in the Journal of General Internal Medicine in 2007, researchers asked several hundred doctors about a hypothetical 50-year-old male patient who showed up with chest pain.
在去年12月发表的一封公开信中，数百名科学家、作家和学者向人类发出了警告：政策制定者和我们其他人必须公开应对全球崩溃的风险。
Hundreds of scientists, writers and academics sounded a warning to humanity in an open letter published last December: Policymakers and the rest of us must engage openly with the risk of global collapse.
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