Escape analysis can be used to convert heap - based object allocation into the less - expensive , stack - based allocations , but it can also be used to make other optimization decisions as well , including optimizing the use of synchronization 可以用escape分析把基于堆的对象分配转换成不太昂贵的基于堆栈的分配，也可以用它做其他优化决策，包括对同步的运用进行优化。
Siyaphila la is proving wrong the widely held idea that the three - pill drug therapy used by millions of westerners but only 11 percent of africans with aids is too expensive and too complicated to administer in poor african communities 塞亚菲拉纳项目证实了在被广泛认可的三片剂疗法（鸡尾酒疗法，在西方被上百万人使用而在非洲只有百分之十一的病人能接受治疗）对于贫穷的非洲社会来说太昂贵而且太管理复杂而不具有实际操控性。
Path ' s vaccine chief john boslego said current vaccines cost up to 60 dollars per dose , far too expensive for many developing countries , and did not work well in developing regions where 50 percent of deaths occur . " wed like to get it down to less than five us dollars at least , " boslego said Path疫苗部门的负责人约翰博斯莱戈表示，目前所使用的肺炎疫苗的价格每支高达60美元，对于很多发展中国家来说价格太昂贵了，以至于尽管50的肺炎死亡都发生在这些地区，但有关疫苗却并未在那里发挥出多大作用。
Nevertheless , they can be divided into several categories on the basis of cost and performance : the personal computer or microcomputer , a relatively low - cost machine , usually of desktop size ( though “ laptops ” are small enough to fit in a briefcase , and “ palmtops ” can fit into a pocket ) ; the workstation , a microcomputer with enhanced graphics and communications capabilities that make it especially useful for office work ; the minicomputer , generally too expensive for personal use , with capabilities suited to a business , school , or laboratory ; and the mainframe computer , a large , expensive machine with the capability of serving the needs of major business enterprises , government departments , scientific research establishments , or the like ( the largest and fastest of these are called supercomputers ) 然而，根据成本与性能，它们可分为几类：个人计算机或微型计算机，一种成本相当低的机器，通常只有桌面大小（尽管“膝上型计算机”小到能够放入公文包，而“掌上型计算机”能够放入口袋） ；工作站，一种具有增强的图形与通信能力、从而使其对于办公室工作特别有用的微型计算机；小型计算机，一般就个人使用而言太昂贵，其性能适合于工商企业、学校或实验室；以及大型机，一种大型的昂贵机器，具有满足大规模工商企业、政府部门、科研机构或者诸如此类机构需要的能力（其中体积最大、速度最快的称为巨型计算机） 。
