Any of various extinct primates , such as pithecanthropus , sometimes considered intermediate in evolution between the anthropoid apes and modern human beings .
猿人已经灭绝的灵长目动物的一种，如爪哇猿人，有时被认为是从类人猿到现代人类演化过程的中间阶段。
Gorillas , chimpanzees and gibbons are all anthropoid apes , having long arms , no tails and highly developed brains .
