Once ivory has left its country of origin, and if it is seized by customs officials, it can be hard to identify its source and those responsible for acquiring it.

一旦象牙离开其原产国，并且如果象牙被海关官员抓获，那么就很难识别出其产地以及找出那些对此有需求的人。

youdao

I'm sure they [Ivory Coast and Togo] will push hard but it's a case of having those discussions and waiting to see what comes back from them.

我知道他们(科特迪瓦和多哥足协)也非常希望自己的队员尽快归队集训，但是这件事可以坐下来讨论，商讨一个大家都接受的结果。

youdao

It is hard toargue that stopping the ivory trade has permanently transformed the elephant'sfuture.

还很难说针对象牙交易的禁令已彻底拯救了大象的未来。

youdao

Already, the "hard" ivory of cyclotis fetches a higher price in the growing markets of the Far East than "softer" ivory from African savanna elephants.

NPR: Lifting the Ivory Ban Called Premature

Adapted by Ruth Prawer Jhabvala from the novel by Kazuo Ishiguro, this Merchant-Ivory production strains so hard to portray dignified restraint that it almost seizes up with good manners.

NEWYORKER: The Remains of the Day

Gabon holds about 13% of the forests of Central Africa but it is home to around 40, 000 forest elephants, a smaller species that are attractive to poachers because their ivory is tinged with pink and is very hard.

BBC: Poaching boom sees thousands of elephants killed in Gabon