Since then, the old man furtively fetched the gold sand once every half a month or so, so he became rich soon.
从此，老汉过个十天半月就偷偷来取一次金砂，日子很快富裕起来。
The former civil servant lives with his son, drinks milk every day and has no major illnesses, although he now writes in his diary only once or twice a month.
老人曾经是公务员，和他的儿子住在一起；每天喝牛奶，身上没什么大病。
He calls at every house in the street once a month.
他每月一次，都要来这条街上光顾每一户人家。
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