have one's back to the wall不要理解为“背靠着墙”的那种舒适，相反，它用来比喻没有退路、情况危急、处境困难或穷途末路，经常可以用在商业领域，形容公司面临的严峻形势。

【例句】
He owes money to everyone - he really has his back to the wall now.
他欠每个人钱——他现在真是穷途末路了。

The company has its back against the wall and if the employees do not help out now, it will be bankrupt soon.
公司现在情况危急，如果员工现在不帮助公司，公司很快就会破产。