They noticed the festival decorations on the opening screen and some of the pictures they saw.

孩子们注意到了开始屏幕上的节日装扮,和一些他们见过的图片。

麻省理工公开课 - 媒体、教育、市场课程节选

One is by just showing you a series of pictures which you might recognize and talk about why this is an example of Biomedical Engineering.

其中之一便是给你们看一些图片,你们可能见过图里这些东西,谈谈它们与生物医学工程的关系

耶鲁公开课 - 生物医学工程探索课程节选