但这种抗体对人体是否有效和安全，仍有待进一步研究。
But the antibodies to the human body is effective and safe, requires further study.
人学已经成为当代国内外学术前沿的热点，而马克思的人学思想仍有待进一步深入开发和研究。
Now human science has been a hot point in theory field, however, it needs to study and develop.
进一步说，目前基于内容的视频检索的语义处理理论和技术仍有大量问题有待深入研究。
That is to say, a lot of problems concerning semantic processing theory and technology of CBVR need a further study.
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