Race relations in the usa continue to be a thorny problem 对于美国来说，一直以来，种族关系恰似如鲠在喉。
3.
As often as i ' ve read this speech , getting a lump in my throat every time 每当我阅读这篇演讲词的时候，总感觉心情激动，如鲠在喉。
4.
That ' s something . as often as i ' ve read this speech , getting a lump in my throat every time . i ' ve never detected one stylistic problem , much less 13 . shows how little i know 真是奇迹!每当我阅读这篇演讲词的时候，总感觉心情激动，如鲠在喉。我却从未发现过它有一处文体错误，更不用说它有13处错误了。这表明我的知识何等贫乏啊！
