The odd couple : A tigress walks along a piglet at the Sri Racha tiger zoo, the world's largest tiger breeding centre in Thailand, as it reopens following a bird flu outbreak. (AFP/Saeed Khan)

词汇：

odd adj.奇数的，不成对的，临时的

tigress n.母虎，雌虎

piglet n.小猪

breeding n.饲养，教养

outbreak n.（战争的）爆发，（(疾病的）发作