北极的"居民"是如何过冬的?

Siberian Tigers

Of the three remaining species of tigers, Siberian tigers are the largest. While there are only 400 to 500 left in the wild, the population is considered stable, and conservation programs are introducing captive-born tigers to the wild.

西伯利亚虎

世界仅存的三个虎种中，西伯利亚虎算是保留最多的一种了。但野生西伯利亚虎只有400到500只，数量稳定，动物保护机构正在研究如何野化人工驯养老虎的后代，让其重返自然。