象牙的高额卖价不断地刺激着人们在非洲到处猎杀大象，特别是在一些几乎不存在法律的地方猎杀。
The high price of ivory is increasing the incentive to kill elephants everywhere in Africa, and especially in places where there is virtually no law.
星期二（2月11日）颁布的这一禁令几乎全面禁止在美国境内进行象牙交易。
The document issued Tuesday places an almost complete ban on the ivory trade in the United States.
后来植物象牙逐渐被塑料所取代，因为塑料制作成本更低。除了制作一些小纪念品外，植物象牙几乎被人们遗忘了。但现在它又慢慢地回来了。
Later, ivory plant gradually replaced by plastic, because plastic lower production costs in addition to making some small souvenirs, plants ivory almost been forgotten, but now it slowly back.
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