斯坦福大学项目负责人、作家王家井(音)在一封邮件中告诉BBC，说：“大麦的发现很令人惊讶。”因为此前学界一直认为大麦传入中国的时间还要再晚1000年。
"The discovery of barley is a surprise," lead author Jiajing Wang of Stanford University told the BBC in an email, as it was previously thought the grain arrived in China 1,000 years later.
王家寨煤矿为中央并列式通风，漏风量较大，主井通风阻力较大。
Retrograde ventilation is used for Wangjiazhai coal mine, both air leakage and ventilation resistance of the main shaft are largish.
王家寨煤矿为中央并列式通风，漏风量较大，主井通风阻力较大。
Retrograde ventilation is used for Wangjiazhai coal mine, both air leakage and ventilation resistance of the main shaft are largish.
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