| 1. | Condensation occurs when the supersaturation is positive .
当过饱和是正值时，则出现凝结。 |
| 2. | The radius vector of each solid is always a positive length .
每个立体的矢径总是正值长度。 |
| 3. | They came from new york state and took up land when the country was new .
他们从纽约州来，购置了土地，那时乡村正值初创。 |
| 4. | The problem with adding the individual errors is the canceling effect of the positive and negative values .
把各个误差直接相加的结果是，正值和负值相互抵消了。 |
| 5. | Only in the tropics were numerous late cretaceous groups extinguished during peaks in their evolution .
只是热带地区才有大批晚白垩纪生物类群正值其演化的极盛时期突然消亡。 |
| 6. | It was a fine november day, cold and breezy yet clear and dry. a weak sun sparkled off the wavelets .
这时正值十一月，海风嗖嗖，寒气袭人，然而气清天朗，阳光微照，碧波粼粼。 |
| 7. | He was, at the very moment of his betrothala moment for pure thoughts and cloudless hopespitchforked into a coil of scandal .
他正值订婚的时刻一个需要纯洁的思想和光明的希望的时刻被卷入一团纷乱的丑闻当中。 |
| 8. | We are testing it now [ see box on page 61 ]
该系统目前正值测试阶段（参见上图） 。 |
| 9. | He is now at the meridian of his intellectual power
他现在正值智力的鼎盛期。 |
| 10. | It is said to symbolize integrity and serenity
传说中；竹，象征着正值与宁静相处。 |
