全力以赴：全身心地努力，达到身体疲惫或无能力的程度。
work very hard, like a slave
同义词： slave / buckle down / knuckle down
Break One's Back(辛勤工作), 此释义来源于网络辞典。
... break one's back拼命干,尽最大努力 break the back of sth完成某事最艰难的部分 get sb's back up触怒某人 ...
... behind somebody's back 背着某人 break one's back 拼命做 back down 放弃;打退堂鼓 ...
... break the ice 破冰 break one's back 辛苦 break wind 放屁 ...
On-loan West Ham striker Freddie Sears dragged his effort wide in response, but Scunthorpe did pull one back just before the break courtesy of McDonald's well-taken finish.
The 23-year-old American is back to defend his title and young enough to one day break Lagat's record of eight victories.
After five years working as an acrobat on his first show, the gymnast hurt his back and needed a break, so took a job as a coach for one of Cirque's traveling shows in Europe.