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2020-10-03T08:38:51+00:00
分离变量法和积分变换法真是要了亲命了,真想把拉普拉斯和傅立叶的坟刨了
[img]https://img.nga.178.com/attachments/mon_202010/12/-7Q5-4wzdK9T8S3a-3g.jpg.medium.jpg[/img]
[img]https://img.nga.178.com/attachments/mon_202010/12/-7Q5-4wzdK9T8S3a-3g.jpg.medium.jpg[/img]