big ratio bonus的用法和样例：
- It has the big ratio of depth to width and also has the irregular fa?ade,what are devised to suit to the process flow .
- The ramjet engine has many advantages such as simple structure, light weight, little volume, big ratio of pushing and gravity, low cost, and etc.
- The particle's diameters of nano-particle and " de Broglie" wavelength of election are about the same length/The nano-solids are made of nano-particles with big ratio surface.
- Compared with electromagnetic starting motor,permanent magnet starting has the characteristics of small volume,low weight,high efficiency and big ratio efficien-cy to weight.
- When change gear could not be mated for too big ratio of differential change gear,to select suitable teeth number increament to finish hobbing of big prime number helical and straight-toothed gears.