【答案解析】For decades, China has been promoting several high-yielding crops in its campaign of green revolution. Though it has solved the problem of feeding more than one billion people, it has paid a high price: the deterioration of ecological environment and the loss of biodiversity, both of which deserve our alert and attention. Under this context, the history should not be repeated. It is only by proceeding from China's actual conditions with a distinct perception and a sensible judgment that we can carry out the research on the strategy for the sustainable development of agriculture. We should also learn from and employ the theories and practices from outside China in a selective manner while pursuing innovation in theory and breakthroughs in research approaches, so that we can establish a theory with Chinese characteristics for the sustainable development of agriculture.