They go to the site of the change and drop a grain of soil.

他们前往发生变化的地方，然后丢下一粒泥土。

youdao

It is about the size of a grain of rice and is called the stirrup.

它的大小大约是一粒米，被称为马镫。

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The ivory Buddha carved by Shen Weizhong is the world's smallest piece of sculpture, its size being just four-fifths of a grain of rice.

沈为众雕刻的象牙佛像是世界上最小的雕刻，它只有一粒米的五分之四大。

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John Ridley,a grain farmer in New South Wales, says his crop could fail if the rains do not come soon.

VOA: standard.2009.09.03

in some ways, one has to admit also there maybe a grain, if not more than a grain of truth in what he seems to be saying.

我们多么不喜欢他，但必需承认,他可能有点儿道理，但就那么点儿,关于他所说的话。

耶鲁公开课 - 政治哲学导论课程节选

Alright. So take it with a grain of salt.

好，我们就说到这里。

哈佛公开课 - 计算机科学课程节选

In fact, take all such daily explanations of market turbulence with a grain of salt.

FORBES: Market Turbulence Or Deeper Ills?

You should "take Internet research and advertising with a grain of salt, " adds Krebs.

CNN: Cranky doctor or annoying patient? Sometimes it's both

"It's always good to take the directions with a grain of salt, " said Owings of GPSTracklog.

CNN: Why your trusty GPS sometimes fails you