It is not easy to be systematic and objective about language study.
系统、客观地看待语言学习并不容易。
But they are not deep, thorough and systematic.
但均不够系统、全面和深入。
There is not an overall and systematic theory knowing to the function of security market.
对于证券市场的功能，一直没有全面而系统的理论认识。
In this regard, a systematic analysis and in-depth study is not meaningless.
对此，进行系统的剖析和深入的考察是不无意义的。
And study on Themes in Chinese is not systematic.
而学者们对汉语主位的研究并不系统。
And study on Themes in Chinese is not systematic.
而学者们对汉语主位的研究并不系统。
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