1-antiquity 古代

2-legendary 家户喻晓的

And reported cases go back to antiquity including such legendary figures as Thomas More and Marie Antoinette.

3-dormant 休眠的，蛰伏的

Human hair cycles between a growth phase, a resting phase and a dormant phase.

4-pigment 色素

5-hair follicle 毛囊

Pigment is produced by the hair follicle to colour the hair during the anagen phase.

6-intense 强烈的

7-physiological 生理的

8-simultaneously 与此同时

But when people are under intense emotional or physiological stress, large numbers of their follicles will hit telogen, simultaneously producing a large percentage of non-coloured hair.

9-potent 强有效的，有力的

10-conceivably 可能地

Interestingly, these hormonal signals have less potent effect on non-coloured hair, so a person could conceivably lose large amounts of coloured hair, leaving behind mostly grey hair.

11-execution 处决

12-at hand （在时间或空间上）接近

So when a person suffers a stressful time, for example, he knows an execution at hand, his hair will go grey.

13-put down to 归因于

That puts down to genetics rather than stress.

14-ahead of schedule 提前

So no matter how stressful your life may become, it might help to know that although you may achieve your pigmentary potential a little ahead of time, you can't go grey overnight.