actor
/ˈæktə(r)/noun
1- a person whose profession is acting on the stage, in films, or on television演员。
1.1
- a person who behaves in a way that is not genuine像在演戏的人：
in war one must be a good actor.
战争中人们必须是好演员。
1.2
- a participant in an action or process（行动或过程）参与者：
employers are key actors within industrial relations.
雇主是工业关系中的主角。
USAGE
In the time of Shakespeare female roles were played by boys or men, and women did not appear on stage in England until after the Restoration of 1660. Female performers were then called either actors or actresses - it was only later that actor became restricted to men - and it seems that we are returning to the original situation. Although there is still an awards category at the Oscars called Best Actress, some people are again using the gender-neutral term actor for both sexes. See also usage at -ESS1.
词源
late Middle English (originally denoting an agent or administrator)： from Latin， 'doer， actor'， from agere 'do， act'. The theatre sense dates from the 16th cent.