Section A Put the following paragraph into Chinese. When dominant innovators in a science respond to the challenge of a situation that demands some change in its practice, this may take a number of forms, and rival schools may grow up around different leaders responding differently to a particular situation. These rivalries may be reinforced and perpetuated by the use of standard textbooks. Any empirical science must be able to cope with its own phenomena, and once any observation is accepted as relevant, its theory and modes of description and analysis must be able to handle it with scientific adequacy, of which exhaustiveness, consistency, economy are basic principles. The extension of a science to new but relevant fields may require the further elaboration and presentation of existing theory along previously-followed lines.