translation.en: We can also magnify small mechanical movements, like vibrations in engines, that can help engineers detect and diagnose machinery problems, or see how our buildings and structures sway in the wind and react to forces.
translation.zh: 我们同样也可以方法微小的机械运动， 如引擎的震动， 这可以帮助工程师诊断机械问题， 或者看到建筑或结构的随风摇动。