三键的 meaning in English

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The preparation of gold electrode of double layers and the spectroscopic and electrochemical studies when it was incubated with bacteria : cv measurement demonstrated that the defect content within the double layer gradually decreased during the incubation , sers showed that the film structure became order during the incubation and the bands of double and triple bonds shifted toward high wavenumber , too
循环伏安测试表明在双分子层与细菌培养的过程中，双分子中层中的的缺陷数量逐渐减少。表面增强拉曼光谱证实在双分子层与细菌培养的过程中，双分子中层的膜结构变得更加有序，且其双键与三键的共振峰也同时向高波数的方向移动。