| 31. | an indispensable addition to every library |
| 每个图书馆都不 可缺少的新书
|
| 32. | an interesting addition to the literature of the subject |
| 有关这一题目的文献中一本有趣的新书[新作]
|
| 33. | a much-to-be-welcomed addition |
| 求之不得的增添物（新添的人）.
|
| 34. | in addition |
| 另外，还有
|
| 35. | in addition to |
| 除…之外（还有）
|
| 36. | addition of revenue to the national exchequer |
| 岁人之纳入国库
|
| 37. | do ten simple problems in addition and subtraction |
| 做10道简单的加减题
|
| 38. | depression of freezing point of water by addition of salt |
| 加盐使水的冰点降低
|
| 39. | the signs for addition , subtraction, multiplication and division |
| 加、减、乘、除的符号
|