There will never be a perfect standard.

永远不会有十全十美的标准。

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The selection of PM material and magnetic structure is important for design of PM starter motor. It is the most important problem for designer to solve, but there is no perfect standard to be adopted.

永磁材料和磁极结构的选择直接关系到永磁起动机设计的成败，是永磁起动机设计者首先应当解决的问题，目前尚无完善的选择原则。

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Each year, the high standard of entries has shown that the Awards are the perfect platform to showcase the very best photography of the British landscape.

每年，高水准的参赛作品表明该大赛是展示最美英国风景摄影作品的完美平台。

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The two-MRC standard was never considered a perfect guide to force sizing and modernization.

CENTERFORSECURITYPOLICY: Center for Security Policy | The Measure of a Superpower: A Two Major Regional Contingency Military for the 21st Century

PC's architecture was not perfect, but its adoption as an industry standard made possible economies of scale in both hardware and software.

ECONOMIST: The PC's 25th birthday

With Military Standard 810G certification, DuraPro is a perfect fit for consumers and business customers who need a tough feature phone on a high-speed nationwide network.

ENGADGET: Kyocera DuraPro keeps the rugged flip phone alive on US Cellular for $100