| 1. | The positive and negative ions become separated or dissociated .
正负离子彼此分开或解离。 |
| 2. | Weighing is inherently a more positive and accurate method .
称重法从根本上说是一种更可靠和更精确的方法。 |
| 3. | In some way, positive and negative ions are developed in a thunderstorm .
在雷雨中，正离子和负离子以某种方式形成。 |
| 4. | The chipped area is not between the lugs of adjacent positive and negative plates .
破碎部分不在相邻的正负极耳之间。 |
| 5. | As the two charge distributions separate, leaving positive and negative sheaths .
当两种电荷分布开始时，就留下正离子鞘和负离子鞘。 |
| 6. | In the region where the corona exists, large numbers of positive and negative ions are formed .
在存在电晕的区域，形成了大量正离子和负离子。 |
| 7. | In the course of time positive and negative acceleration impulses tend to cancel one another .
在长时间中，正向和反向加速度冲击有互相抵消的趋势。 |
| 8. | 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。 |
| 9. | " recently " has the widest use , in positive and negative statements and questions , with the past tense and the present perfect tense
“recently”用法最广，可用于肯定式陈述句、否定式陈述句及疑问句中，与过去时态和现在完成时态连用。 |
| 10. | An element is assembled from one positive group "nested" in a negative group, with negative plates always on the outside, and positive and negative plants in alternating position .
一个极群组是把正极群“套”进负极群内组装而成的，负极板总是在外侧，而且正、负极交错放置。 |
