How to separating meiofauna accurately from sediments is an unfathomed problem because meiofauna has the similar size and density with sediment granules .

由于小型底栖生物的大小、比重等 物理 特性与沉积物颗粒接近，如何高精度地分离样品成为一个 难题。

How to establish creep model of under change loads are unfathomed contents in theory studies and applications of wood rheology .

如何建立木材在变载荷下蠕变的数学模型，是 木材流变学在理论研究和 生产应用中 迄今 尚未 解决的问题。

It is an unfathomed and difficult problem that weak and small targets are detected in complicated background and low SNR .

复杂背景下低信噪比弱小目标的 自动检测是 当今目标 自动 探测研究 尚未 解决的一个 难题。

It is also explain the unfathomed problems and the function can be optimized in the illumination system . That could be the refernce of the latter research .

具体的说明了 文章 的 尚未 解决的问题和可以继续优化的方面，为后期的研究提供的参考。

The unfathomed problems of how to optimize the fuzzy rule base are discussed .

对其 结构进行分析，并对模糊 控制 理论 未解决的规则 选取问题进行探讨。

Some study results and technologies of submarine sand ridges geomorphology are summarized and several unfathomed issues of sand ridges on the eastern China seas are discussed in this paper .

综述了国内外海底沙脊地貌的研究成果、技术方法以及东中国 海沙脊研究中存在的问题。

We deal now not with things of this word alone but with the illimitable distances and as yet unfathomed mysteries of the universe .

我们不单 要 从现在这个世界，而且 要从 无法估算的距离、从神秘 莫测的宇宙 来论述事物。