Critics , however , are not yet ready to accept that the rhesus study proves caloric restriction works in primates .

但是，批评家们并不准备接受猕猴研究证明了低卡饮食适用于灵长类生物这一说法。

Although few similar studies of other primates have been conducted , recent research with rhesus monkeys has shown only very limited shrinkage with age .

尽管已经对其他灵长类动物进行过类似的研究，但只有最近对猕猴的研究才显示出随着年龄增长很有限的萎缩。

Scientists use rhesus monkeys to study hiv / aids drugs , research vaccines for rabies , smallpox and polio , and to study potential uses for embryonic stem cells .

科学家利用猕猴研究艾滋病毒/艾滋病的药物，研究狂犬病，天花和脊髓灰质炎疫苗，研究胚胎干细胞的潜在用途。

Nevertheless , the evolutionary lineages leading to humans and rhesus monkeys diverged about 30 million years ago , leaving scientists in the dark about when the human pattern of brain aging might have begun .

不过，演化谱系导致人类和猕猴大约在三千万年前分开了，这使得科学家们不知道人类大脑衰老模式可能开始的时间。

Testing whether calorie restriction also stretches human life span is impractical , however , so more than 20 years ago , scientists put two groups of rhesus monkeys ( which have an average life span of about 27 years ) on skimpy rations .

测试限制能量摄入是否也能延长人类的寿命是不现实的，然而，20多年以前，科学家们仍给两群猕猴（它们的平均寿命约27岁）以能量限制的口粮。