这是一个全球性的记录：在取自不同大陆位置的沉积标本中，同位素比率的变化非常小。
It is a global record: there is remarkably little variation in isotope ratios in sedimentary specimens taken from different continental locations.
不管这些文件是储存在同一位置还是不同位置，用户是否可以用同一方式在系统中存取所有文件？
Does a user access all the files in a system in the same manner, regardless of whether they reside at the same or different sites?
荷叶铁线蕨不同位点的异交率在同一居群内的变化很大，而不同居群间的同一酶位点的异交率差异也是较大的。
X. Lin has great change in the same population, and the outcrossing rate difference of the same enzyme locus is also high in the different population.
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