英语翻译Often a wrong answer counts off double while an omitted answer counts off only one.

问题描述:

英语翻译
Often a wrong answer counts off double while an omitted answer counts off only one.

报数;挑出

Often a wrong answer counts off double while an omitted answer counts off only one.
经常一个错误答案要扣(counts off)两分, 然而一个未答题目只扣一分.

答错了往往要倒扣分(也就是1分的题扣2分),而不答的话只是扣这道题的分.
count off 是在这句的语境下是扣分的意思.