[with negative](informal)a source of amusement or pleasure
(非正式)快乐之源
life is not exactly a barrel of laughs at the moment.
此刻生活并非欢乐无限。
(informal, chiefly US)with unrestrained force or emotion
(非正式， 主 美)全力以赴；全情投入
Granting, giving, or requesting no credit
以现金的，现付的：不承认、不给或不要信用卡的
paid cash on the barrel for the car.
付现金买了这辆车
In a very awkward position from which extrication is difficult
困境：很难摆脱的艰难处境
During the negotiations the opposing faction had us over a barrel.
在谈判中，那个对抗的派别使我们一筹莫展