| 1. | Pay special attention to the sign of the answer .
特别注意答案的正负号。 |
| 2. | It is now necessary to introduce a sign convention for radii of curvature .
现在必须介绍曲率半径的正负号规则。 |
| 3. | When any two rows or two columns are interchanged, the sign of the determinant is changed .
当任何两行或两列互换时，行列式的正负号改变。 |
| 4. | He did not use negative numbers, which he regarded as contradictory, but introduced a complicated scheme called "correspondence of signs" .
他不使用他认为有矛盾的负数，却引进了一套复杂的图表，称为“正负号的对应”。 |
| 5. | Sign and type of measurement of sea surface temperature
-海面水温正负号及量度方式标记 |
| 6. | Sign and type of wet bulb temperature
-湿球温度正负号及类别标记 |
| 7. | Sign of temperature 0 for 0 xc or above , 1 for below 0 xc
-温度正负号标记0表示摄氏0度或以上， 1表示0度以下 |
| 8. | Check sign indicator
核对正负号指示器 |
| 9. | The # character permits a numeric character or a plus or minus sign in this position , but doesn ' t require it
表示该位置可以填一个数字或正负号，或什么都不填。 |
| 10. | The size of the boolean type is not explicitly defined ; it is only specified to be able to take the literal values true or false
数值类型全都是有符号(正负号)的，所以不必费劲寻找没有符号的类型。 |
