虎穴[hǔ xué]
（比喻危险的境地） tiger's den; a tiger's cave-- a dangerous place:
例：不入虎穴焉得虎子。
The only way to catch tiger cubs is to go into tiger's den -- take necessary risk.
1. the lion's mouth：the line of sight 视线 | the lion's mouth 虎穴 | the lion's share 最大的份额
2. Tiger Cave：Thunder Ridge Tower 雷脊之塔 | Tiger Cave 虎穴 | Tomb of the Last Rites 最後儀禮之墓
3. lion's mouth：hard mouth 不顺从的马 | lion's mouth 虎穴 | swelled head 自满