Spelling: bēi shuǐ chē xīn
Interpretation: Save a burning firewood with a glass of water. Metaphor power is too small to solve the problem.
Out: "Mencius told the son": "Today's people still have a car and a glass of water."
Example: Those who haven't paid back a cent of their new debts, except that they promised to give Ding Xia thirty taels, are a drop in the bucket. (Qing Lvyuan Li's "Qi Lu Deng" seventy-four)
Synonym: of no help.
Antonym: more than enough, immediate effect.