We know only too well that what we are doing is nothing more than a drop in the ocean. But if the drop were not there, the ocean would be missing something.

我们都非常清楚我们的努力无非就是大海中的一滴水，但若是没了这一滴滴水，大海便也不再是大海了。

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There is only one thing missing -- the pandas.

BBC: The return of China��s wild panda

It is only within the past decade that there has been recognition of how important the missing data on the submerged shelf is.

UNESCO: Underwater Cultural Heritage