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单词 leaded gas
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No. What else happened? DDT was banned, the  catalytic converter was introduced, leaded gas was removed from the environment. All of this happened  in those five years, while we were still at war.

不,还有什么事发生? DDT 被禁止, 催化转化器被引入,含铅气体被从环境中移除。 所有这一切都发生在这五年里, 当时我们还在打仗。

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