It is also the major direction in the future development of sericulture in China. However, there are still lots of unsolved problems left in whether theory or practical utilization now.
但目前无论在理论上还是实用化方面都还存在许多有待解决的问题。
参考来源 - 家蚕颗粒人工饲料育的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
There are formidable problems associated with practical utilization of solar energy.
有些难题和太阳能的实际应用有关。
There are formidable problems associated with the practical utilization of solar energy.
有一些令人生畏的难题与太阳能的实际应用联系在一起。
In practical utilization, the poor effect of dust removal because of the improper design and operation exists universally and proposed improving schemes.
在实际应用中，由于设计和操作不当，致使除尘效果不佳的情况普遍存在，本文对此作了分析并提出了改进措施。
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