remain: to continue to be in the same state or condition
1)中秋节一直是中国人最喜欢庆祝的节日之一。
The Mid-Autumn Festival remains one of the most celebrated festivals for Chinese people.
2)造句
恐龙的灭绝一直是未解之谜。
The reason why dinosaurs become extinct remains unknown.
remain: to continue to be in the same state or condition
1)中秋节一直是中国人最喜欢庆祝的节日之一。
The Mid-Autumn Festival remains one of the most celebrated festivals for Chinese people.
2)造句
恐龙的灭绝一直是未解之谜。
The reason why dinosaurs become extinct remains unknown.