其他的限制还有：用户是否需要得到权限才能传递内容、内容的格式有何要求以及目标受众是谁。
Other restrictions include whether the user needs permission to transfer the content, in what format the content must be, and who the target audience is.
首先要确定目标观众是谁以及接下来要达到的结果，在展示前向这些目标受众发送邀请函。
It has to be decided first who is the target audience and then according to the result, send out the invitation letters to the right people before the demonstration.
首先要确定目标观众是谁以及接下来要达到的结果，在展示前向这些目标受众发送邀请函。
It has to be decided first who is the target audience and then according to the result, send out the invitation letters to the right people before the demonstration.
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