1.  outer ring
2.  outer race

• 1. 外环: outer ring
• 2. 首都外环高速公路大战: Beltway Series
• 3. 外环境: external environment | outdoor environment | external environmemt | milieu exter

更多释义

• 1.学习攀岩，享受美好的户外环境。
  Learn rock climbing and enjoy the great outdoor environment.
  dict.yoduao.com
• 2.在今年新冠肺炎的情况下，我们会尽最大努力为顾客创造一个安全的户外环境。
  We'll try our best to create a safe open-air environment for our customers under the circumstances of COVID-19 this year.
  dict.yoduao.com
• 3.他的第一次旅行是和他的一个朋友徒步 M25 高速公路，这是一条长达188公里的伦敦外环公路。
  For his first trip, he went hiking with a friend around the M25—a 188-kilometre road that goes all the way around London.
  dict.yoduao.com

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