life单复数可不可以乱用.they devoted all their life into .还是they devoted all their lives int
问题描述：
life单复数可不可以乱用.they devoted all their life into .还是they devoted all their lives int
答
1.作为抽象名词时,life是不可数的,可解释为：生活或生命.
2.作为具体名词时,life是可数的,可理解为：某人的具体生活方式或某个人的具体生命（能呼吸、会说话、可行动等）.
如：led a hard life. 就是抽象名词.
The hero saved many people's lives.就是具体名词.
如何使用,要在具体语境中推测.