英汉例句双语例句In the 20th century three of the eight sub-species of tiger became extinct - the Balinese in 1937, the Caspian in the 1950s and most recently the Javan in the 1980s.在20世纪中，野生虎八种亚种中的三种已经灭绝，1937年巴厘虎灭绝，里海虎于50年代灭绝，最近的瓜哇虎则是于80年代灭绝。