英语语法分析

Caloric-restriction projects underway in two species more closely related to humans—rhesus and squirrel monkeys—have made scientists optimistic that CR mimetics could help people.

对与人类联系更密切的两个物种——猕猴和松鼠猴——进行热量限制的项目，使科学家对模拟热量限制可以帮助人类抱有乐观的态度。

But this photo is not [of] a rhesus monkey.

但是照片当中的猴子并不是恒河猴。

He and his colleagues trained two rhesus monkeys to follow a moving target on a computer screen.

他与同事们训练两只恒河猴注视电脑屏幕上移动的目标。