For the initial experiment, lone fish were trained in the lab to associate a door bearing a certain number of geometric shapes with the path to rejoining a larger group.

最初的实验中，一条鱼在实验室里训练，通过一个几何形状的门能够回到群体中去。

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Motivational posters hung on one wall, bearing slogans like “Failure is the path of least persistence.”

励志海报挂了一面墙壁，海报写着“坚持就是胜利”等口号。

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By the way of improving roller dimensions, roller number, outer roller path diameter, stop groove diameter and the effective thickness, the using reliability of the bearing is advanced.

通过对轴承结构中的滚子尺寸、滚子数量、外圈滚道直径、止动槽直径公差及有效壁厚的改进，提高其使用的可靠性。

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