| 31. | The preparation of this acid seems to have been first described as far back as the 15th century. |
| 这种酸的制法似乎早在15世纪就已有了记载。
|
| 32. | An army must be as hard as steel in battle and can be made so; but, like steel, it reaches its finest quality only after mush preparation . |
| 一个军队在战斗中必须意志坚强，并完全能做到这一点；但是，这就像钢一样，要达到优质必须多次预先加工。
|
| 33. | a medicinal preparation |
| 药剂
|
| 34. | inadequate supplies, income, preparation |
| 不足的供应品, 收入, 准备
|
| 35. | a pharmaceutical preparation |
| 药剂
|
| 36. | begin preparation of the land for sowing |
| 开始平整土地准备播种
|
| 37. | undertake the preparation of a book |
| 着手编写一本书
|
| 38. | mental preparation |
| 精神[思想]准备
|
| 39. | a painkilling preparation |
| 止痛剂
|
| 40. | be in preparation |
| 在准备中；在编辑中
|