have a wolf by the ears这个短语的意思不是“有狼的耳朵”，真正意思是“处于危险境地，骑虎难下，进退两难”。

【例句】
The invaders found it too late that they were holding a wolf by the ears.
侵略者发觉自己骑虎难下的时候，已经太迟了。

They really have a wolf by the ears in such situation.
在这样的情况下，他们真的是骑虎难下了。