tip of the iceberg
冰山一角
口语·形容问题远大于表面所见
英文释义
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.
典故来源
源自冰山现象，露出水面的部分仅占总体积的十分之一，比喻问题表面部分远小于隐藏部分。