四十岁的用法和样例：
例句
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这不好猜，但我猜她大约是四十岁左右。
It's a long shot, but I should say she's about forty. -
想不到四十岁的人竟像个孩子。
You wouldn't think a man of forty could be such a child. -
他刚刚四十岁时，头发就变得灰白了。
His hair became gray when he was only forty. -
也许我错了，但是我想她快四十岁了。
Perhaps I am wrong, but I think she is near forty.
