no mean feat
成語所屬單字feats
no mean feat — 慣用語
1. something that is very difficult to achieve, and therefore impressive
1.慣用語
釋義
絕非易事；了不起的成就
something that is very difficult to achieve, and therefore impressive
例句
Getting all the children to sit quietly for an hour was no mean feat for the camp leader.
Lin finished the race in under three hours, which is no mean feat at her age.