Question

armpit

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arm∙pit / ˈɑrmˌpɪt ; ˈɑ:mˌpɪt /
◙noun [C]
1. the hollow place under your arm where it joins your body
• 腋（窝）
2. the armpit of sth, [AmE informal] the ugliest or worst place in a particular city or area
• 最差的地方，最肮脏（最差）的角落:
 »Dale says Butte is the armpit of Montana.
  戴尔称巴特是蒙大拿州最差的地方。