r. in an unnecessary manner
r. without any necessity
adv. 不必要地, 多余地
1. She spent unnecessarily long hours on her homework.
她在作业上花了不必要的很长时间。
2. Don't worry about unnecessary details; focus on the main point.
不用担心不必要的细节；专注于要点即可。
3. The meeting was unnecessarily complicated with too many topics.
会议因为主题太多而变得不必要地复杂。