定律 (通过大量事实归纳而成的结论, 是客观规律的表达形式之一) law 能量守衡定律 law of the conservation of energy; 万有引力定律 the law of universal gravitation; 物质不灭定律 law of conservation [indestructibility] of matter; 物质能量守衡定律 matter-energy equivalence
( 5 ) finally , an enlarged emitter model was designed according to hydraulic engineering model principle , which was used for exploring hydraulic similarity between the original model and the enlarged model ( 5 )根据水工模型定律,放大滴头原型,探索了其与滴头原型的水力相似性。