（一）典型的自然地理区域、自然生态系统区域以及已经遭受破坏但经保护和修复能够恢复的同类自然生态系统区域；
In addition to the first/best/last fit allocation strategy introduced in DOS 2.11, DOS 5.0 introduces three additional strategies, each of which is combined with the first/best/last fit strategy:
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Query based compilers are all the rage