a. showing lack of care for consequences
a. 不负责任的;不可靠的
1. She was fired for being irresponsible with her work.
她因为对工作不负责任而被解雇。
2. It's irresponsible to drive without wearing a seatbelt.
不系安全带开车是不负责任的行为。
3. His irresponsible spending habits led him into debt.
他不负责任的消费习惯使他陷入了债务。