不过，据英国阿伯丁皇家学院大卫•乔利和一个研究小组认为，乌克兰博提施撞击地球事件比之前的墨西哥希克苏鲁伯撞击事件要晚5,000年。

But according to David Jolley of King's College in Abaerdeen, U.K. and a team of researchers, Bolytsh slammed into the planet less than 5, 000 years before the giant Chicxulub impact in Mexico.

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通过乌利希国际期刊指南，迈克尔·麦博告诉我们每年“被引用的科学/学术”文章数量增长率为3.26% （即每二十年翻一番）。

Using Ulrich's Periodicals Directory, Michael Mabe shows that the number of "refereed academic/scholarly" publications grows at a rate of 3.26 percent per year (i.e., doubles about every 20 years).

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