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.