当你年轻时，你认为四五十岁就算是步入老年了。
Well when you're really young you assume that old age starts when you're about 40 or 50.
马克说：“我有5个叔叔是在四五十岁左右死于心脏病，但从未想过会发生在自己身上。”
Having had five uncles who had all died in their 40s or 50s from heart disease, he says, "I never thought it would work out."
通常女性到了四五十岁进入更年期(也叫停经期）时，会经历一系列心理、情绪和激素的变化。
When a woman reaches menopause, usually in her 40s or early 50s, she goes through a variety of psycho- logical, emotional and hormonal changes.
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