但对纤网结构这方面所作的研究缺乏理论指导。
However, study on the web structure is lack of theoretical foundation.
目前多热源联网运行的理论与技术尚未成熟，实践中缺乏理论指导。
At present, the operation of multi-source network theory and technology is not yet mature, the lack of theoretical guidance in practice.
而对于宣传资料翻译的研究力度也不够，目前的研究大都缺乏理论指导。
Besides, the study of the translation of publicity materials is a comparatively less explored area where there is a serious lack of guiding theory.
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