已有的资料表明关于这一课题的现有研究是不完整、不系统、不深入的。
The existing materials indicate the existing research about this subject is incomplete, not systematic, not deep.
而且光纤非由绝缘体资料造败，出无会呈现同轴电缆果外皮带电引行辐射招致波形得实的题纲。
And optical fiber is made of insulating material, will not arise the problem of waveform distortion caused by the radiation of the charged cable sheath.
本文利用从中国第一历史档案馆所藏乾隆朝刑科题本婚姻家庭类档案中获得的个案资料，对1 8世纪中后期的中国家庭结构进行了考察。
The author has used case materials in the files on marriage and the family stored in the First Chinese Historical Archive to investigate family structure in the mid and late 18th century in China.
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