复数形式是sets，意思是一组，例如：
1.And there isn't a complete sets of flawless laws and regulations with high legislative level to offer full regulation of the genetically modified technology and GMOs from the whole bio-security and consumption security perspective.而且还没有一套完善的，从整个生物安全及消费安全角度对转基因生物技术及其产品的监督管理做出全面、系统规定的高立法层次的法律法规。
2.And it doesn't match any of the sets.而且跟任何一套都不符。
