【正确答案】正确答案：I am already a middle-aged man. At middle age, I feel sad to find my eyesight and memory failing, my hair thinning and graying, and myself no longer mentally and physically as fit as when I was young. I often suffer from a nameless loneliness. The most intolerable of all is the lack of friendly warmth and comfort due to the gradual passing away and estrangement of more and more old pals. Needless to say, the number of acquaintances increases with one's age. The older one gets, the more widely travelled one is and the more work experience one has, thus, the more acquaintances one is supposed to have. But not all acquaintances are friends. We come to know many people either in the way of business or by mere chance-say, having been at the same table at a dinner party.

【答案解析】解析：1．画线部分第一段第二句中的“头发开始秃脱而且变白了”指头发变得稀疏且白，可译为my hair thinning and graying，这里用动词的现在分词形式是因为要与前面的find搭配；“难以名言的”在这里可译为nameless，意同indescribable，但nameless常用来指不好的事物，如：a nameless fear，nameless atrocities等。 2．画线部分第一段第三句中“逐渐减少”在原文指“逐渐作古”，如直译为the gradual dwindling away则不能明确表达“死去”的意思，故译为gradual passing away。 3．画线部分第二段第一句中“理该”一词，意思为“理所应该”，据此可翻译为is supposed to。 4．画线部分第二段第二句翻译时应注意“相识的人”和“朋友”的区别，这也是这篇文章的核心内容之所在，因此我们可将“相识的人”译为acquaintances，以与friends区别开来。 5．画线部分第二段第三句“我们和许多人相识，或是因了事务关系，或是因了偶然的机缘”翻译时可以把“我们和许多人相识”译作主句，将后面的“或是因了事务关系，或是因了偶然的机缘”译作方式状语，这样比较符合英文的表达习惯。