There's every indication that Milton believed, as I had mentioned before, at an unconscionably early age, that poetry was his vocation.

就像我之前说过的，有很多的迹象表明，弥尔顿在很早之前就相信诗人就是他的天职。

耶鲁公开课 - 弥尔顿课程节选

Little Mama is petite, weighing about 100 pounds, and the only physical indication of her age are the gray hairs on her chin.

CNN: Meet one of the oldest chimpanzees in captivity

The researchers believe a person's immunological parameters could provide an indication of their true biological age.

BBC: Biological clue to why women live longer than men

"It is an indication that more parts may be showing their age, " Erickson said.

CNN: Mars rovers working overtime