keep a diary
US /kiːp ə ˈdaɪ.ə.ri/
UK /kiːp ə ˈdaɪ.ə.ri/

1.
寫日記, 記日記
to regularly write down your thoughts, experiences, and observations in a personal journal or notebook
:
•
She decided to keep a diary to record her daily adventures.
她決定寫日記來記錄她的日常冒險。
•
It's a good habit to keep a diary, especially when you're traveling.
寫日記是個好習慣,尤其是在旅行時。