| 1. | If t=s, the binary operation is said to be closed .
当TS时，二元运算叫做封闭的运算。 |
| 2. | The set e may be thought of as a binary relation on set v .
集合E可看成集合V上的一个二元关系。 |
| 3. | The salary was ten dollars for the first week and twelve thereafter .
薪水是第一个星期十元，以后十二元。 |
| 4. | A tabulation of a function of two variables is cumbersome, but possible .
二元函数的列表法是不方便的，然而是可能的。 |
| 5. | A binary relation from a set a to a is said to be a binary relation on a .
从集合A到A的二元关系，称为A上的二元关系。 |
| 6. | The condensation was carried out with an excess of glycol or of dicarboxylic acid .
聚缩反应是在二元醇或是在元羧酸过量下进行的。 |
| 7. | A binary relation on a set that is reflexive and symmetric is called a compatible relation .
一个集合上的二元关系，如果它是自反的也是对称的，可称它为相容关系。 |
| 8. | The second significant characteristic of the ozonolysis reactions concerns the origin of the biradical species .
臭氧分解反应的第二个重要特征与二元基物质有关。 |
| 9. | The most important kind of currency is paper, in various denominations: one, two, fives, tens, etc .
最重要的一种货币是纸币，有各种面额的：一元的，二元的，五元的，十元的等等。 |
| 10. | One of the immediate impacts of these discoveries was the conceptual difficulty inherent in adopting a dual model .
这一发现的直接影响之一是由二元模型固有的概念性困难所造成的。 |
