id	domain	url
easat-2376	creativecommons.org	https://creativecommons.org/licenses/by/4.0/)
easat-2376	doi.org	https://doi.org/10.2307/249008
easat-2376	doi.org	https://doi.org/10.16129/j.cnki.mysdx.2007.08.007
easat-2376	creativecommons.org	https://creativecommons.org/licenses/by/4.0
easat-2376	doi.org	https://doi.org/10.2307/249008
easat-2376	doi.org	https://doi.org/10.16129/j.cnki.mysdx.2007.08.007