defence是可数名词吗

　　Defence soaks up 40 percent of the budget.

　　国防开支要耗费40%的预算。

　　The Irish team were solid as a rock in defence.

　　爱尔兰队的防守坚如盘石。

　　She put up a spirited defence in the final game.

　　她在最后一场比赛中进行了顽强的防守。