| 1. | Potash production in the united states was not developed until world war i .
一直到第一次世界大战时美国苛性钾的生产才扩大开来。 |
| 2. | The first chemical mutagens to be discovered were the mustard gases used in world war i .
最初发现的诱变剂是第一次世界大战所用的芥子气。 |
| 3. | By the start of world war i the necessary conditions for such a break were present .
等到第一次世界大战爆发时，断绝关系的必要条件具备了。 |
| 4. | Ever since world war i and the russian revolution, host countries have shown willingness to seize the assets of multinationals .
自从第一次世界大战和俄国革命以来，一些东道国一直显露要没收跨国公司资产的意图。 |
| 5. | After world war i there was a general rebellion of youth against "old fashioned" ideas, particularly patriarchal family relationships .
一次世界大战后，青年们普遍反对“老式”思想，特别是反对家长式的家庭关系。 |
| 6. | Between world war i and 1971 people became increasingly aware of the threat that any given exchange rate might change .
从第一次世界大战到1971年的这段时间里，人们日益觉察到有这样的威胁，即任何一个既定的汇率都可能会变动。 |
| 7. | The murder was the prologue to world war i
这场谋杀是第一次世界大战的序幕。 |
| 8. | Who was president dur - ing world war i
问：第一次世界大战时美国总统是谁？ |
| 9. | Britain was an ally of america in the world war i
英国在第一次世界大战中是美国的同盟国。 |
| 10. | World war i and the world in its aftermath
第一次世界大战和其后的世界 |
