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1.作用The role of a work is to communicate its message to the spectator.一部艺术作品的作用在于把它的含义传达给观众。2.职能貌似一般是用function来表示职能吧。3.角色She has just landed the lead role in their latest production.她刚在他们最新的作品中取得了主角。
且吃且增重
1、
作用
例：
Until now scientists had very little clear evidence about the drug's role in preventing more serious effects of infection.
到目前为止，科学家们几乎没有该药物在防止更严重的感染后果的功能的明确证据。
2.
角色
例：
She has just landed the lead role in their latest production.
她刚在他们最新的作品中取得了主角。
3、
职能
例：
The head coach role held by Kelvin Travis will remain how it has always been
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