I visit my grandparents four times a month.
我一个月去看望祖父母四次。
How often does she swim? Four times a month.
她多久游泳一次？一个月四次。
The answers are always something like, "Once a month" and "Four hundred times a second".
“，而答案往往是”一月一次“和”每秒四百次“。
The answers are always something like, "Once a month" and "Four hundred times a second".
“，而答案往往是”一月一次“和”每秒四百次“。
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