Occasionally , a sequence of fossil-rich layers of rock permits a comprehensive look at one type of organism over a long period of time.
偶尔,一个富含化石的岩层序列可以让我们持续并全面地观察一种生物。
2
A sequencetype is just a sequence of objects.
有序类型仅仅是指对象的顺序。
3
XPath 2 introduces a few new sequencetype constructs that allow applications to use the type definitions and element declarations in an XML schema to match elements in an XML instance document.