| 11. | Picasso painted a red circle as a symbol of the Revolution. |
| 毕加索画了一个红色圆圈作为革命的象征。
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| 12. | "H2O"is the symbol for water. |
| H2O是水的符号。
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| 13. | C is the symbol of carbon. |
| C是碳元素的符号。
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| 14. | Red is the symbol of revolution. |
| 红色是革命的象征。
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| 15. | Ever since then, the great monument has been a symbol of liberty for the millions of people who have passed through New York Harbour to make their homes in America. |
| 从那时起，这座伟大的纪念碑对通过纽约港进入美国定居的千百万人来说就一直是自由的象征。
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| 16. | The olive branch is the symbol of peace. |
| 橄榄枝是和平的象征。
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| 17. | This symbol , +, means " add" ,. |
| "+"这个符号表示“加”。
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| 18. | The oak is a symbol of strength ,the lion of courage, the lamb of meekness, white of purity. |
| 橡树是力量的象征，狮子是勇敢的象征，小羊是温顺的象征，白色是纯洁的象征。
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| 19. | a chemical symbol |
| 化学符号
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| 20. | a mathematical symbol |
| 数学符号
|