But in many cases, these systems have been maintained for many years — i.e., these are "legacy systems" that are important for the enterprise, but they are often difficult to understand and maintain.
但在很多情况下，这些系统维持了许多年——也就是，这些是对企业很重要的“遗留系统”，但它们经常是很难被理解和维护的。
Chile, one of the most successful economies in Latin America, maintained controls on capital inflows for many years but has now suspended them.
智利是拉美最成功的经济体之一，多年来一直对资本流入实行管控，但目前已中止了这一做法。
However, for years after that even many devoted Blackberry handset users maintained a separate cell phone for voice.
尽管如此，多年后仍有相当多的忠实用户在使用没有语音通话功能的黑莓手机。
It is the first Japanese university accepting the Chinese students. Waseda University has maintained close exchange and cooperation with Chinese educational institutions for many years.
早稻田大学是日本著名的综合性私立大学之一，创立于1882年，是日本最早接受中国留学生的大学，多年来同中国教育机构保持密切的交流合作。
His hobby literature and writing, for many years has been maintained reading the habit of reading.
他爱好文学和写作，多年来一直坚持着看书阅读的习惯。
The worry is that they might go the way of Nokia: for years the Finnish handset firm maintained high margins, in defiance of its many doubters.
市场心存这样的疑问，三大巨头会不会重走诺基亚的老路。 这家芬兰的手机制造商多年来在一片质疑声中维持了良好的业绩和股市表现，但是突然间，唱衰者一语成谶。
The Wall was repaired and maintained over the course of many dynasties, especially during the Ming Dynasty, when the work continued for some 200 years.
明朝初年大规模修筑长城，约200年后完成，东部主要为砖石结构。
The Wall was repaired and maintained over the course of many dynasties, especially during the Ming Dynasty, when the work continued for some 200 years.
明朝初年大规模修筑长城，约200年后完成，东部主要为砖石结构。
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