2. How would this solution differ if the lower charge were negative? 倘若下面的电荷是负的，那么结果有什么不同？
3. The metaphors of darkness are overwhelmingly negative: danger, decay, and death. 黑暗毫无疑问是消极的象征：危险、衰败、和死亡。
英英解释
n.
1. a reply of denial
2. a piece of photographic film showing an image with black and white tones reversed v.
1. vote against; refuse to endorse; refuse to assent
2. characterized by or displaying negation or denial or opposition or resistance; having no positive fe
3. having a negative electric charge
4. expressing or consisting of a negation or refusal or denial
5. having the quality of something harmful or unpleasant
6. not indicating the presence of microorganisms or disease or a specific condition
7. reckoned in a direction opposite to that regarded as positive
8. less than zero
9. designed or tending to discredit, especially without positive or helpful suggestions
10. involving disadvantage or harm
