这是新概念第三册第一课的标题
a puma at large
at large是一个习惯短语,它的含义为：
1、在逃, 逍遥法外
The escaped prisoner is still at large.
那个逃犯仍逍遥法外.
2、一般说来, 随便地
The people at large want peace.
总的来说人民是渴望和平的.
They wandered at large over the country side.
他们在乡间随便地漫游.
3、详细地
She talked at large about her plans.
她详细地谈了她的打算.