tip of the iceberg
冰山一角
口語·形容問題遠大于表面所見
英文釋義
a small, noticeable part or aspect of a larger, more complex issue or problem
例句
The few complaints we received are just the tip of the iceberg.
典故來源
源自冰山現象，露出水面的部分僅占總體積的十分之一，比喻問題表面部分遠小于隱藏部分。