should start recording their temperature for a week beginning on day two of their period
问题描述：
should start recording their temperature for a week beginning on day two of their period
答
应该开始记录他们一周开始或那段时期其中的两天的温度.
on 应为 or 吧........
答
应该开始记录他们一周开始在那段时间其中两天的温度