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TPO是我们常用的托福模考工具，对我们的备考很有价值，下面小编给大家带来托福阅读TPO18(试题+答案+译文)第3篇:Lightning。

托福阅读原文

【1】Lightning is a brilliant flash of light produced by an electrical discharge from a storm cloud. The electrical discharge takes place when the attractive tension between a region of negatively charged particles and a region of positively charged particles becomes so great that the charged particles suddenly rush together. The coming together of the oppositely charged particles neutralizes the electrical tension and releases a tremendous amount of energy, which we see as lightning. The separation of positively and negatively charged particles takes place during the development of the storm cloud.

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