Many theories of natural science are held to be true not only because they were so considered when natural scientists originated them, but because they have been verified in subsequent scientific practice 许多自然科学理论之所以被称为真理,不但在于自然科学家们创立这些学说的时候,而且在于为尔后的科学实践所证实的时候。
Nursing, based on the theory of natural science and social science, is a comprehensive and practical subject which studies the theory, knowledge, technique and discipline to maintain, promote, and renew people s health 护理学是以自然科学和社会科学理论为基础,研究维护、促进和恢复人类健康的护理理论、知识、技术及其发展规律的综合性应用学科。