Concerning the device of little corrosion and small size of itself , the design can begin from the economic consideration ; but concerning the corrosive medium or large titanium device , then the safety of the device should be first guaranteed 对介质腐蚀性不强或自身尺寸较小的设备，设计可以多从经济性方面着手；而对强腐蚀性的介质或大型的钛制容器，则必须优先保障设备的安全性。
The five important factors in sustainable development are population control , use of resources , care of the environment , economic considerations and social conditions and these form the content and core of teaching quality geography studies in the middle school 而对于具有可持续发展思想的人的培养，必须依赖于教育。可持续发展的五个因素人口、资源、环境、经济、社会，正好是中学地理教学所涉及的主要内容。因此，可持续发展应成为中学地理教学的核心内容。
The chief executive announced in his policy address in january that a lantau economic and infrastructural development co - ordination task force would be established to draw up , from a " macro " perspective , a master blueprint for the future development of lantau . the task force will co - ordinate the economic and infrastructural development of lantau , following the principle of sustainable development and balancing environmental , social and economic considerations . this will ensure that the various projects can be expedited and completed on schedule 行政长官在本年一月发表的施政报告中，宣布成立协调发展大屿山经建项目专责组，从宏观大局出发，为大屿山的未来发展制订总蓝图，统筹大屿山的经济及基建发展，确保各项目能够在有利本港持续发展的原则下，平衡环境社会及经济各方面的考虑因素，并使项目更快推进，按时完成。
The new nature conservation policy is to regulate , protect and manage natural resources that are important for the conservation of biological diversity of hong kong in a sustainable manner , taking into account social and economic considerations , for the benefit and enjoyment of the present and future generations of the community 新自然保育政策旨在顾及社会及经济的考虑，以可持续的方式规管、保护和管理对维护本港生物多样性至为重要的天然资源，使现在及将来的市民均可共享这些资源。
Generally speaking , the treatment can be carried out in combinations of pre - treatment , primary treatment , secondary treatment and advanced treatment and the application depends on the available raw water quality and the required finished water qualities as well as economic considerations 总之，用水及废污水的处理技术大致上可分为前处理、初级处理、二级处理及高级处理等处理方式，依据各种不同的原水水质及处理水水质之要求，以及经济有效的考量下，选择适当的处理程序组合进行处理。
Construction and economic of buildings : condition surveyors of buildings ; analysis of capital and running costs ; monitoring the effect of construction works on existing buildings ; feasibility studies , covering plot ratio and site coverage , preparation of sketch plans , assessment of development potential as well as financial and economic considerations 建筑物的建造及经济问题：建筑物现状检验；资金及经常费用分析；监察建造工程对现有建筑物的影响；可行性研究，包括地积比例、地盘覆盖率、草拟计划、发展潜力评估及财务经济分析等
