Until now, the public has had access to only a very small percentage of that total. 迄今为止，公众看到的情报只不过是冰山一角。The airliner crash is seen as merely the tip of an iceberg.这次飞机坠落被看作仅仅是冰山一角（只是其中的一个例子）。冰山: icebergRelative explainations: Examples:1. 冰山的大部分在水面以下. Most of the iceberg is under the water.2. 冰山把那船撞出了窟窿. The ship was holed by an iceberg.3. 泰坦尼克号出发四天以后，一座巨大的冰山向它漂来。 Four days after the Titanic set out, a very big iceberg floated towards her.
