4 sentences

1. 这只是冰山的一角。

   zhè zhǐ shì bīng​shān de yī jiǎo.

   This is just the tip of the iceberg.

   Source: OpenSubtitles

2. 泰坦尼克号因为撞上冰山而沉没了。

   Tài​tǎn​ní​kè Hào yīn​wèi zhuàng​shàng bīng​shān ér chén​mò le.

   The Titanic sank after hitting an iceberg.

   Source: Dong Chinese Dictionary

3. 冰山浮在水上的部分很小，大半都在下。

   bīng​shān fú zài shuǐ​shàng de bù​fen hěn xiǎo, dà​bàn dōu zài xià.

   The part of the iceberg floating above the water is very small; most of it is below the surface.

   Source: Dong Chinese Dictionary

4. 他投靠的那个人只不过是一座冰山，迟早会倒台的。

   tā tóu​kào de nà gè rén zhǐ​bu​guò shì yī zuò bīng​shān, chí​zǎo huì dǎo​tái de.

   The person he relies on is just a temporary power who will eventually fall.

   Source: Dong Chinese Dictionary