Cadmium is a known carcinogen and is similar to lead in that it can hinder brain development in the very young.

VOA: standard.2010.01.11

So, they're sitting down and they're seeing a movie where one character's going to help a ball achieve a goal, and another character's going to hinder the ball.

所以婴儿们坐着看影片,影片讲述一个人极力进球,而另一个人要极力阻挠

耶鲁公开课 - 心理学导论课程节选