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平台:
DOAJ Directory of Open Access Journals
(Available from 2010 until 2022.)
EBSCOhost Academic Search Complete
(Available from 2010/12/01.)
ProQuest SciTech Premium Collection
(Available from 2010/01/01 until 2016/12/31. Available from 2018/01/01 until 2020/07/31.)