The couple's relationship has become so bad that it is too late to remedy the situation.

参考译文：这对夫妇的关系已经变得如此糟糕以至于改善这种局面为时已晚。

解答：“remedy”表示改进，纠正，so...that引导结果状语从句，It is too late to remedy the situation,it为形式主语，to remedy the situation为不定式作句子真正主语。

(1) remedy   vt. 改正；纠正；改进(英文解释：If you remedy something that is wrong or harmful, you correct it or improve it.)

This situation is easily remedied.这种情形易于补救。

A great deal has been done internally to remedy the situation.  已经做了很多内部工作对这种情形进行补救。

(2)recover  vt.复原；恢复常态(英文解释：to return to a normal state after an unpleasant or unusual experience or a period of difficulty )

It can take many years to recover from the death of a loved one.从失去亲人的痛苦中恢复过来可能要花很多年。

The economy is at last beginning to recover.经济终于开始复苏了。

(3)heal  vt.（使）康复，复原 (英文解释： to become healthy again; to make sth healthy again )

It took a long time for the wounds to heal.伤口过了很长时间才愈合。

The cut healed up without leaving a scar.伤口愈合没留下疤痕。

This will help to heal your cuts and scratches.这个会有助于治好割伤和擦伤。

It was a chance to heal the wounds in the party.那是弥合党内创伤的机会。

Within six weeks the bruising had gone, but it was six months before it all healed.

青瘀在6周内就消退了，但伤却是6个月后才全好了。

If they'd operated and pinned her arm at once, she might have healed by now.

如果他们当时马上就给她的胳膊做手术并用钢针固定，她现在可能已经痊愈了。

A year later, she had healed to the point of at least being able to consider a romantic relationship with another man.

一年以后，她的感情创伤已慢慢愈合，至少能考虑和另一个男性开始恋爱关系了。

Only by fully experiencing the depth of our pain can we be healed from it and be done with it.  

只有充分感受了深切的痛苦，我们才能从中走出，并将它抛诸脑后。

 Today Sophie and her sister have healed the family rift and visit their family every weekend.

如今索菲和她的姐姐已经和家人和好，每个周末都回家探望他们。

The psychological effects on the United States were immense and in Washington the wounds have still not fully healed.  

对美国造成的心理影响是巨大的，在华盛顿创伤仍未完全弥合。

She was never able to heal the rift between herself and her father.她一直未能填平和她父亲之间的鸿沟。

The breach between them never really healed.他们之间的裂痕从来没有真正弥合。