##### whether ... or ... - 不论 ... 或 ... - A student will have to learn all the lessons **whether** they are easy **or** difficult. - 学生必须学习所有课程无论是简单还是困难。 - Whether … or not 不论是否... - he was not certain **whether** his friend was there **or not**. - 他不确定他的朋友是否在那儿