尚未探明

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2.

The Amazon species probably has the best prospects; though its numbers are uncertain, Martin thinks at least 100 , 000 are left .

相比而言，亚马逊河豚算是泡在蜜罐里了。虽然尚未探明准确数量，马丁认为至少有 100000 只。

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China is rich in oil resource . Among unproved resource, commercial and sustainable exploration resource has a large percentage .

我国石油资源比较丰富，尚未探明的石油资源中有经济性、可持续勘探的资源比例较大。