But I have to tell you -- and sorry, Richard -- but I never did like biology field trips much,  and I think we can just about make do with one every few hundred million years.
但是我必须告诉你 -- 对不起，Richard -- 但是我从来都不是那么喜欢生物学实地考察， 我想我们可以每数百万年才进行一次。