excitement可数吗?

　　The children went wild with excitement.

　　孩子们欣喜若狂。

　　Excitement has been at fever pitch for days.

　　狂热的兴奋持续了好些日子。

　　The drug produces a feeling of excitement.

　　这种药能使人产生兴奋的感觉。

　　The announcement sent a ripple of excitement through the crowd.

　　这件事一宣布就在人群里引起了一阵兴奋。

　　His face was bright with excitement.

　　他兴奋得满脸放光。