由于节点资源受限，如何尽可能减小建立间接对偶密钥的路径长度是该类算法的研究焦点之一。
Due to node resource constraints, research focuses on achieving minimum path length of indirect pairwise key construction.
专家们关注的焦点集中在长度小于20的肽段。
The experts focused on peptides with a length of less than 20 amino acids.
利用解析函数的性质，通过反双曲余弦计算出了由共焦点椭圆导体柱面组成的电容器内电场和单位长度的电容，并对结果作了进一步讨论。
The electric field and capacitance of a confocal elliptic capacitor are calculated by the inverse hyperbolic cosine analytic function, and discussion on them is performed.
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