deftness       
noun [ U ] uk/ˈdeft.nəs/ us/ˈdeft.nəs/
 熟练;机敏;敏捷
the quality of being skilful, clever, or quick
  The device must be used only with the greatest care and deftness of touch. 使用该设备时必须非常小心,谨慎操作。 
 The Government has already shown a deftness that has surprised politicians in both parties. 政府表现出令两党政客都感到惊讶的机敏手腕。 
 See: deft
 - More examples
 - He has shown communication skills and political deftness.
 - Her latest novel displays her characteristic deftness with language.
 - The figure was modelled in wax with extraordinary deftness.