对于高频域复杂耦合结构的载荷识别是载荷识别领域需深入研究的一个课题。
The research on the loading identification of complicated coupled structures in high frequency domain is an issue which is needed to be studied further.
随着房地产价格指数的作用充分显现，探求预测房地产价格指数的有效方法是需深入研究的方向。
As real estate price indices play more significant roles, it is necessary to give more effective method for forecasting real estate price indices.
需进一步深入研究方能解决共价键的起源问题。
Further study is needed before the origin of the covalent bond can be considered a settled question.
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