The strength of an individual, as compared with that of the masses, is but a drop in the ocean.

个人的力量和群众的力量相比，不过是沧海一粟。

《新英汉大辞典》

But while such support as Wang Zhi's is vital, it is a drop in the ocean.

王志们的援手固然重要，但这仅是杯水车薪。

youdao

It is a drop in the ocean. But, hell, the tax credit is a waste of public money and should be scrapped.

这笔税收扣减犹如沧海一粟，但毕竟是在浪费公众的钱，应该被削减。

youdao

In the context of the whole economy the cost would be a drop in the ocean.

BBC: Highlands fuel cost-cut plan

But even then, this would be nothing more than a drop in the ocean.

FORBES: Shock horror - the Olympics are not Keynesian

Depending on whether you are an optimist or a pessimist, the grant is a significant boost or a drop in the ocean.

ECONOMIST: Malaria research gets a shot in the arm