drop ·phrase (IDIOM)
Definition: a very small amount compared to the amount needed Level: C2
我的抗议信只是杯水车薪。
My letter of protest was just ___a ___drop ___in ___the ___ocean.
自然这只是杯水车薪，但我们可以希望其他人会模仿我们的行为。
Naturally it is ___a ___drop ___in ___the ___ocean, but we can hope that the others will imitate our behaviour.
与所需的总资金相比，这笔捐款只是杯水车薪。
The donation was ___a ___drop ___in ___the ___ocean compared to the total funds needed.