Studiousness is the quality of being studious — the habit of spending a lot of time reading and studying, treated as a thing you can talk about on its own. Studious describes a person; studiousness names the trait inside them.

Studiousness is the quality of being studious是studious好學這個特質的名詞形式——the habit of spending a lot of time reading and studying也就是花很多時間閱讀、用功的習慣，treated as a thing you can talk about on its own被當成一件可以獨立討論的事情。Studious describes a person studious形容的是一個人；studiousness names the trait inside them studiousness講的是這個人身上的特質。

Because it names a quality rather than a person, it turns up where people discuss character: school reports, essays about someone's life, descriptions of a family. 'Her studiousness impressed her teachers.' 'He was known for his quiet studiousness.' You would not use it about one homework session — it is about a lasting way of being.

Because it names a quality rather than a person因為它指的是特質而不是人，it turns up where people discuss character它常出現在討論人格特質的地方：school reports學生的成績評語, essays about someone's life關於某人生平的文章, descriptions of a family對一個家庭的描述。Her studiousness impressed her teachers她的studiousness讓老師印象深刻。He was known for his quiet studiousness他以安靜的studiousness著稱。You would not use it about one homework session你不會用它來形容一次的功課，it is about a lasting way of being它指的是一種持久的存在方式。

This is a rare and formal word, rarer than studious itself. Even educated speakers reach for something simpler in conversation: 'how hard she works', 'she's always reading'. So recognise it when you read it, but you do not need to use it. If you want to say the same thing more naturally, use the describing word: 'she is very studious'.

This is a rare and formal word這是個罕見又正式的字，rarer than studious itself比studious本身還要少見。Even educated speakers reach for something simpler in conversation就連受過教育的人平常講話也會用比較簡單的說法：how hard she works她多用功、she's always reading她總是在看書。So recognise it when you read it所以看到它的時候要認得它，but you do not need to use it但不需要自己用它。If you want to say the same thing more naturally如果你想用更自然的方式表達同一件事，use the describing word就用形容詞：she is very studious她很studious。

It is uncountable, so there is no plural and no 'a studiousness' — you say 'his studiousness', 'a certain studiousness', 'great studiousness'. It can carry the same faint shading as studious: admiration for the seriousness, with a hint that the person is quiet and lives among books.

It is uncountable它是不可數名詞，so there is no plural and no a studiousness所以沒有複數，也不會說a studiousness——you say his studiousness你會說his studiousness、a certain studiousness a certain studiousness、great studiousness great studiousness。It can carry the same faint shading as studious它可能帶著跟studious一樣淡淡的意味：admiration for the seriousness對認真態度的讚賞，with a hint that the person is quiet and lives among books暗示這個人安靜、生活裡離不開書本。