我们走到沼泽边上，极目望去，沼泽无边无涯。
We walked to the edge of the swamp and looked over it .
在“哟噢”、“呀”、“了”这样的尾音上，又急转直下，带着呻吟似的沉痛，逐渐地消失在这无边无涯的荒凉的田野上。
In end sounds , he took a sudden turn and become worse rapidly with a deep feeling of grief like groans , gradually disappeared in this endless and desolate field .
无边无涯