With drooping heads and tremulous tails,they mashed their way through the thick mud,floundering and stumbling he between whiles,as if they were falling to pieces at the large joints.

• 几匹马低着头、摇着尾，踩着深深的泥泞前进着，时而歪斜，时而趔趄，仿佛要从大骨节处散了开来。