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平台:
DOAJ Directory of Open Access Journals
(Available from 2015.)
Nature Journals Free
(Available from 2015/12/01 volume: 1 issue: 1.)
ProQuest SciTech Premium Collection
(Available from 2015/05/01.)
SpringerLink Open Access
(Available from 2022/01/01 volume: 1 issue: 1.)