| 1. | Polyethylene is an excellent barrier to water vapor .
聚乙烯保水蒸汽的性能良好。 |
| 2. | The vapor made his eyes prick .
水蒸气使他眼睛刺痛。 |
| 3. | At point e, the substance is wholly in the vapor phase .
到e点时，物质全部变为气相。 |
| 4. | Water vapor is a normal constituent of the atmosphere .
水蒸气是大气的正常组成部分。 |
| 5. | The light beam passes through the container holding the vapor .
光束通过盛蒸汽的容器。 |
| 6. | This new machine sometimes transpires a lot of hot vapor .
这部机器有时排出大量的热气。 |
| 7. | Warm air can contain more water vapor than cold air .
热空气要较冷空气容纳更多的水蒸汽。 |
| 8. | The diary would be reduced to ashes and himself to vapor .
日记会化为灰烬，他自己会化为乌有。 |
| 9. | The condensed vapor boron content was reduced to 2～3 mg/1 .
冷凝蒸汽中硼含量可降到2-3毫克升。 |
