adv.(引出第二种选择或可能的建议)要不，或者

There are several alternative routes to the city center, in case the main road is closed.
这里有几条替代路线通往市中心，以防主路封闭。
She decided to study abroad as an alternative to working after graduation.
她选择出国留学作为毕业后工作的替代方案。
He suggested using solar power as an alternative energy source.
他提议使用太阳能作为一种替代能源。
The company offers flexible working hours as an alternative to a traditional 9-to-5 job.
公司提供弹性工作时间作为传统朝九晚五工作的替代方案。
The teacher provided alternative activities for students who were struggling with the main lesson.
老师为在主要课程中遇到困难的学生准备了替代活动。
In bad weather, we can use the gym as an alternative to our outdoor workout plan.
在恶劣天气下，我们可以去健身房作为户外锻炼计划的替代。
He proposed an alternative approach to solving the problem that had been tried before.
他提出了一种不同于以往尝试过的解决问题的新方法。
She chose a vegetarian diet as an alternative to meat-eating for environmental reasons.
她出于环保原因选择素食作为肉类饮食的替代。
They decided on an alternative date for the event, considering the attendees' schedules.
他们考虑到参加者的日程，选择了活动的替代日期。
An online course is often an alternative education option for those who can't attend traditional classes.
在线课程通常是无法参加传统课堂教育的人们的替代选择。