cowbell
noun [ C ] uk/ˈkau.bel/ us/ˈkau.bel/
牛颈铃;牛铃（一种打击乐器）
a bell that is hung from a cow's neck so that the cow can be found, or a metal musical instrument in the shape of such a bell that is hit with a stick
Idiom
more cowbellidiom informal 更多亮点
an extra quality that will make something or someone better
It was a fairly average show - it needed more cowbell. 这场表演相当普通——它需要有更多的亮点。