| 1. | The summation extends over all the ions in the solution .
总和包括溶液中所有的离子。 |
| 2. | It is convenient to introduce here the summation operator .
应当在此介绍一下求和的算符。 |
| 3. | The summation of forces in this and that directions must be zero .
在这个和那个方向上的合力必定为零。 |
| 4. | the summation is over all molecular states for which ≠0.
求和手续遍及于0的所有分子态。 |
| 5. | The integral of the tabulated function can be found by forming a summation series .
表列函数的积分可用列出和的系列求出。 |
| 6. | The electrostatic summation must be evaluated for an explicit set of ion position .
静电能的加和必须根据离子的具体位置来计算。 |
| 7. | The summation forms are quite convenient for computation, especially when the interval is kept constant .
和式形式是十分有利于计算的，特别是当间隔保持常值的时候更是如此。 |
| 8. | Summations are almost invariably indicated ellipses instead of the more prevalent sigma notation .
在表示“连加”的式子中，几乎一成不变地使用省略号来代替更为流行的“”符号。 |
| 9. | A pair of drums is used, and the signals are transformed successively from one to the other as the summation proceeds .
采用双鼓，信号不断从一个鼓传递到另一个鼓就如相加的过程。 |
| 10. | If we wish to check the structure for a significant number of hypotheses， the use of a small computer facilitates the extensive summation processes .
如果要计算未知数很多的结构，使用小型计算机能使大量求和过程更简便。 |
