responsibility责任可数吗

　　She has sole responsibility for the project.

　　那个项目由她一人负责。

　　No one admitted responsibility for the attacks.

　　没有人对这些袭击负责。

　　The matter is outside my area of responsibility.

　　此事不属于我的职责范围。

　　He accepts full responsibility for what happened.

　　他承认对所发生的事负完全责任。

　　Nobody has claimed responsibility for the bombing.

　　没有人声称对爆炸事件负责。