workmate       
noun [ C ]  informal uk/ˈwɜːk.meɪt/ us/ˈwɝːk.meɪt/
 (尤指彼此熟稔的)同事,工友
a person who works in the same place as you, especially one who you are friendly with
  I went out for a drink with a few workmates. 我和几位同事一起去喝了一杯。 
 
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