Researchers have determined that, because of poaching and increased cultivation of their native habitats, there are fewer than 100 Arabian leopards left in the wild, and that these leopards are thus many times more rare than China's pandas.
呀·~~不好意思看错了~~~http://forum.chasedream.com/GMAT_SC/thread-531763-1-1.html?postid=14927586&searchmode=TopicContent&searchtext=poaching and increased 这里有解释的