Twenty percent of us exercise only one to three times a week.

百分之二十的人一周只锻炼一到三次。

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Only two percent of the students watch TV one to three times a week.

只有百分之二的学生每周看一到三次电视。

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To make up the difference, Grassia buys one gallon of milk a week instead of three.

为了弥补差额，格拉亚每星期买一加仑牛奶，而不是三加仑牛奶。

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These trips last from one week to three weeks.

VOA: special.2009.10.07

For one very busy week every three months she cares for patients in Mississippi and performs procedures, such as endoscopy, to which they would never have access.

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In a bid to reduce injuries, the pact eliminated "two-a-day" practices, set a maximum of 4.5 hours on-field per day during training camp, and limited full-contact practices to an average of one per week not exceeding three hours.

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In this group a full 7% purchase one to two deals per week, 4% purchase three to four deals per week and 3% purchase one deal daily.

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