1. The first time I saw Karl Marx was in February 1865.
    我初次见到马克思是在1865年的2月。

2. To get to know the heart that beat within Marx the scholar, you had to see him when he had closed his books and was surrounded by his family, or on Sunday evenings in the society of his friends.
    要了解马克思这位学者的性情，你还得看看在合上书本之后他和家人在一起的时候，或者星期天晚上他和朋友在一起的情况。

3. Karl Marx was born in Germany, and German was his native language.
    卡尔 马克思生于德国, 德语是他的本族语.

4. Karl Marx was born in Germany, and German was his native language.
    卡尔 马克思生于德国, 德语是他的本族语.

5. Karl Marx was one of those rare men who are fitted for the front rank both in science and in public life.
    卡尔·马克思是那种不可多得的人物，在科学工作和政治生活中都处于先锋地位。

6. Marx wrote back to say that Engels´ praise had greatly encouraged him.
    马克思回信说, 恩格斯的称赞对自己的鼓励很大.

7. Marx wrote back to say that Engels´ praise had greatly encouraged him.
    马克思回信说, 恩格斯的称赞对自己的鼓励很大.

8. Marx was in poor health then, but was hard at work on the first volume of Capital.
    马克思那时身体欠佳，但他还在努力写他《资本论》的第一卷。

9. Marx could read all the leading European languages and write in three: German, French and English.
    马克思可以用所有主要欧洲国家的语言来进行阅读，并能用德语、法语和英语这三种语言进行写作。

10. Marx was a loving, gentle and considerate father.
    马克思是一位慈爱、和善、体贴的父亲。