- supernumerary finger
- 额外: extra; additional; added
- 指: finger
- 额外指定作业: extra assignment
- 额外: (超出规定数量或范围的) extra; additional; added 做额外工作 do extra work; 旅馆每个房间都有电视机作为额外优待。 television is available in each of the hotel rooms as an extra
- 场外指导: sideline coaching
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