a barrel of laughs

[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。

with both barrels

(informal, chiefly US)with unrestrained force or emotion

(非正式， 主 美)全力以赴；全情投入

on the barrel 或 on the barrelhead

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

over a barrel

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