• 1. 既有: Both | existing | There are both and
• 2. 既有线路改造: reconstruction of existing railways
• 3. 既有的国际体系: existing international system

更多释义

• 1.汽车引起污染，既有烟雾又有酸雨。
  Cars cause pollution, both smog and acid rain.
  dict.yoduao.com
• 2.既有普通的也有昂贵的专营面条的餐馆。
  There are restaurants, both humble and expensive, that specialize in noodles.
  dict.yoduao.com
• 3.氟利昂既有液态也有气态。
  Freon exists both in liquid and gaseous states.
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