对于比较血管成形术和锻炼带来的效果优劣，目前还只有两次非常小的检验，并且都没有证实血管成形术有任何长期优势。
There have been only two very small trials comparing angioplasty with exercise and both failed to show any long term advantage for angioplasty.
面对不断变化和激烈竞争的市场，软件产品质量已成为软件开发公司或企业能够保持其长期优势和获得更多用户的关键。
Face to the constant change and highly competitive market, the quality of software product comes to be the key of the software company.
一个较为突出的顾虑是，JAX - WS 2.0并不支持Web服务配置的Annotation的任何后备选项，这样就可能限制该框架的灵活性和长期优势。
A larger concern may be that JAX-WS 2.0 does not support any alternative to annotations for web services configuration, which may limit the flexibility and long-term advantages of the framework.
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