Finding the suspect is like searching the beach for a particular grain of sand.

找到这个疑犯的几率有如在沙滩上寻找某一颗特定的沙粒。

youdao

To see a world in a grain of sand

从一粒沙子看到一个世界

youdao

They can be as tiny as a grain of sand or as large as a golf ball.

大小可细如沙粒也可大似高尔夫球。

youdao

There is something that one might be able to hold on to: the knob of something, the little flame of something that ; The grain of sand. -The grain of sand; but there is really not a decent metaphor for it, I think.

一个你可以依靠的支点：,一个不同寻常的想法，一个思想的小火花,就像一粒沙中看世界，-一粒沙中看世界;,不过我认为任何比喻都不够贴切。

普林斯顿公开课 - 人性课程节选

Finding the antigens is like searching a beach for a particular grain of sand.

FORBES: In search of antigens

Most are smaller than a grain of sand, according to the American Meteor Society, and usually burn up before they hit Earth's surface.

WSJ: Meteor Creates a Show, No Apparent Damage

If thousands of people owned the team, any individual divorces would have been a mere grain of sand on the beach line of corporate operations.

FORBES: If The Fans Owned The Dodgers ...