Get its value, and set it into the field in the form.
获取其值，并把它设置到表单的字段中。
Only can transmitted messages with necessary external form get into transmission area.
传播信息只有具备了必要的外化形式后，才能进入传播领域。
Only can transmitted messages with necessary external form get into transmission area.
传播信息只有具备了必要的外化形式后，才能进入传播领域。
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