"发表独创性意见" can be translated into English as "express original/innovative opinions" or "voice unique/creative viewpoints".
Here are some example sentences for context:
He always expresses original opinions in meetings.
（他总是在会议上发表独创性意见。）
She is known for voicing unique viewpoints on complex issues.
（她以就复杂问题发表独特见解而闻名。）