As technolegy developed, people find more and more difficult to a deal with a problem with knowledge from just one field.Recent years wittness more and more interdisciplinaries .The speaker claims that people can only achieve breakthrough in one field by incorporating knowledge outside that field.I agree with the speakers idea.I believe that combinations of knowledge from diffrent fields are necceassary for progress in a certain field.
One one hand,the borderlines between different subjects are blur and no discipline can be isolated from other discplines.The clear borderline between Chemistry and Biology is never drew.A Biologist study tiny virus need knowledge about the big organic chemical molecures to proceed his research. The development of  one discipline can not be achieved without the support of other disciplines.Eistein would not finish his work on relativity if he had no knowledge about advanced mathematics.Likely,Biology can not acheive what it is now if physisists have not invented and improved the technology of microscope.
One the other hand ,knowledge and experients from outside a field do help the development in that field.Even through the fields seem most unlikely to connected with a certain field contirbute to its breakthrough.The astronomist who came up with the idea of neutron stars--the end of a star bigger than the sun --was inspired by an article studying the structure of atoms. From that article,he learned that the size of neutron and electron,which are everything make up an atom account for only a very small part of the atom,leaveing much space in atoms.Then he assumed a star where the space between neutrons is very small ,so small that only a spoonful of   matierals constituting neutron star weigh tons.The idea changed the way astronomists thinking about the cosmo and push the studies of astrology a lot.
To sum up,the cooperation between disciplines is indepansable for the development of a discipline.