这些反应的具体机制还有待进一步深入研究。
The mechanisms are still not well understood and need further study.
本文介绍了这方面的研究进展，并提出有待进一步深入研究的问题。
This paper introduces the development in the field, and showed some new subjects which need to investigate further.
反向凝固法和电磁连铸法具有很强优势，但工艺还不成熟，有待进一步深入研究。
Inversely, the inversion casting process and the electromagnetic concasting process have an advantage in competition, but their processes are imperfect and needed to make further improvement.
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