Just like this California condor, which-though teetering on the edge ofextinction-still soars near the Grand Canyon in Arizona and in the state it was named after.
就像加利福利亚秃鹫，虽然依旧翱翔于亚利桑那和加利福利亚的大峡谷附近，但已在灭绝的悬崖边摇摇欲坠。
2
Wang Rongming(1993) calculated the extinction probabilities for a class of random walk in a random environment with the set of non-negative integers as state space.
汪荣明（1993）求出了状态空间为非负整数集的随机环境中随机游动的灭绝概率，并得到明确的表达式。
3
Account is taken of the change in the stateof polarization of multiply diffracted X-rays in Mosaic crystals, and a more rigorous treatment of secondary extinction is given.