细胞 毛细血管结构紧密的连续型，参与构成血睾屏障。

Capillaries belonged to continuous ones, which mainly composed the structure of blood-tests barrier.

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这种新方法不但能够分辨时延结构紧密的多径分量，而且能有效改善多径衰减参数的估计。

The algorithm can distinguish close-spaced multipath components, and to improve multipath attenuation parameters estimation effectively.

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这意味着模拟紧密连接节点的复杂网络结构，如人脑，是非常困难的。

This means simulating a complex network of densely connected nodes - for instance, the human brain - is very difficult.

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Now DNA is a double helix and I've only shown you one part of the helix, right? I've shown you one upright strut and a base hanging off of it, but it forms a double helix because complementary strands of DNA strongly associate with one another and that's a very stable structure.

NA是双螺旋,我只是给你们讲了螺旋的一边,我给你们演示,一条链的支柱及碱基团,但其能构成双螺旋,是因为DNA是完全互补的两条链,彼此之间结合紧密,结构异常稳定

耶鲁公开课 - 生物医学工程探索课程节选