Obviously nobody has been able to go back to 1930, get all the people born in one maternity unit, and half of them eat lots of fruit and veg and olive oil, and then half of them eat McDonald's, and then we see how many wrinkles you've got later.
显然没有人 能回到1930年 找到在同一个产科出生的所有人群样本 让一半人大量食用水果蔬菜和橄榄油 另一半吃麦当劳 然后看看他们长了多少皱纹