Remain: to continue to be in the same state or condition
例句： Mooncakes remain an essential part of Mid-autumn Festival.
翻译：
中秋节一直是中国人最喜欢庆祝的节日之一。
Mid-autumn Festival remains one of the most celebrated/observed national holidays in China.
场景1：离家出走未归是个谜
Her mom left home when she was at her youngest age, and whether she will come back or not still remains a secret.
场景2：教堂地位的权威不可被挑战
After several centuries went by, the authority of this church remains unchallenged.
场景三：保持练习英文的好习惯
Writing and Speaking English remain essential parts in her daily life.
场景四: 大学入取结果未知
It remains unanswered whether he will be accepted or rejected by his wishful university.
