The management of active video object by software is a difficult subject in multimedia technology.
用纯软件实现动态视频对象的管理是多媒体技术中的一个难点。
Economic evaluation in environmental impact on construction project or technology upgrading project remains difficult.
建设项目或技术改造项目的环境影响经济评价至今仍是项目评估中的难点之一。
Too expensive and difficult to dispose are two deficiencies in traditional streaming media broadcast technology.
传统的流媒体直播技术普遍存在着成本高，网络部署难等诸多问题。
R&D of wind turbines has been a hot and difficult point in energy technology field.
高效而可靠的风力发电机的研究与开发已经成为能源技术领域的热点和难点。
Technology is everywhere in modern society, but it is also difficult to define.
技术在现代社会中已经无处不在，但要定义技术却是困难的。
Technology is everywhere in modern society, but it is also difficult to define.
技术在现代社会中已经无处不在，但要定义技术却是困难的。
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