开始时，每隔一天一次，然后渐渐的改为一周一到两次。

Start with every other day, then gradually back off to once to twice weekly.

youdao

开始时，每隔一天一次，然后渐渐的改为一周一到两次。

Start with every other day, then gradually back off to once to twice weekly.

youdao