尽管eXist没有商业版本，但是如果eXist的功能无法满足性能和可伸缩性需求，Mark Logic是不错的替代产品。
Although there is no commercial version of eXist, Mark Logic is a good replacement candidate for eXist when performance and scalability requirements go beyond capabilities of eXist.
根据上述论点，清崎(1993)提出一种可资替代现有教学制度的教育内容，认为这些内容能够更好地满足当今社会的需求。
Based on the above arguments, Kiyosaki (1993) presents an alternative education system that will increase its relevance to the needs of our society today.
与完善的可替代能源的需求，我们看到了前所未有的燃料电池技术的研究。
With the need for alternative power well established, we are seeing unprecedented research in fuel cell technology.
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