他扮演“哈姆雷特”这个角色达到了神似的程度。
His acting of "Hamlet" showed great empathy with the character.
北约各国大使已在日常工作会议上碰面，试图就联军在利比亚应扮演的角色达成一致。
NATO ambassadors have been meeting on a daily basis to try to agree on the role the alliance should play in Libya.
作为一个用例，一项任务应该具有清晰的目的，他可以让执行角色达到预先期望的目标。
As a use case, a task shall provide a clear purpose in which the performing roles achieve a well-defined goal that provides value to a stakeholder.
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