Al is tough-minded. He marshals history to make his argument, and countless examples of civilizations changing course and attitudes midstream roll off his tongue.
戈尔是不随便说话的，他引用历史来支持主张：娓娓道来无数文明的衰落和错误态度的关系。
However, all of them had a very sharp tongue and were very ruthless, tough and even acerbic in criticizing other's works.
然而，他们的批评都非常尖锐，在批评中每个人表现得十分无情、强硬甚至尖刻。
You've got to be tough to do the little things like biting your tongue, waiting your turn and putting up with fools.
在对付日常小事如咬舌头，排队等候和忍耐那些愚笨的人时一样需要顽强。
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