男生:你的seminar准备得如何?女生:明天就要开了,所有事情都处理好了,不过突然XX教授,今天才说他明天不能来。男生:那是个很有名的well known教授啊。女生:是啊,太可惜了,他怎么到最后一分钟才说不能来呢!我都不知道这段missing time要怎么办,那些同学会很失望的。男生:我认识一个local的**,虽然他没那么well known,但是他也有做过lake environment,我觉得他也不错,而且他应该愿意过来,是available的。女生:可是你确定现在能来吗,在最后一分钟通知他来。男生:嗯,那还有个办法,你去图书馆借点lecture的video来放吧,有些内容很震撼,也不错。女生:可是你确定放video不会让同学失望吗,毕竟看video和经历真人lecture很不一样,真人lecture会有互动,唉。问题:你的意见。problem:there is a huge seminar in the environment club, a famous speaker isinvited but he just cancelled his speech. suggestions:to invite another professorwho is not as well-known as the former one to come to the seminar; to use viedo