相差天数 meaning in English

number of days different

If you add to or upgrade your subscription , cleverlearn will provide you a pro rata credit based on the total number of days that lapsed from your old cut - off date to the date the change or addition of your new subscription is effective
如果你增加或是更新定购内容。 cleverlearn会根据你的新的订购周期和旧的周期之间的相差天数为你提供相应的费用信用。