And keeping more of the rhesus monkey will need a few years time, another is not clear how many other animals, because scientists have not yet told them what to do what NIH study.

• 而饲养更多的恒河猴则需要几年的时间，另外尚不清楚需要多少其它的动物，因为科学家尚未告诉NIH他们究竟要做什么研究。