A self-disciplined person can make themselves do what they know they ought to do, without someone standing over them. It is the adjective that matches self-discipline.

A self-disciplined person一個self-disciplined的人 can make themselves do what they know they ought to do能讓自己去做他們知道該做的事, without someone standing over them不需要有人在旁邊盯著。It它 is the adjective that matches self-discipline是self-discipline（自律）對應的形容詞。

You might be self-disciplined about sleep, money, sport, or study — it does not have to be all of life at once.

You might be self-disciplined about sleep, money, sport, or study你可能在睡眠、金錢、運動或讀書上很self-disciplined — it does not have to be all of life at once不需要整個人生都是這樣。

Though actually English speakers use it as praise so often that it can sound like a personality you either have or you don’t. In real talk it is more like a habit in a certain area: someone can be self-disciplined at work and messy at home.

Though actually不過其實 English speakers use it as praise so often英語使用者太常拿它當讚美 that it can sound like a personality you either have or you don't以至於聽起來像是一種你有或沒有的人格特質。In real talk在真實的說法裡 it is more like a habit in a certain area它比較像是某個領域裡的習慣: someone can be self-disciplined at work and messy at home一個人可以工作上很self-disciplined，但在家裡卻很邋遢。

It describes a person or their way of living. It is not a verb, so we do not say “I self-disciplined yesterday.” We say someone is self-disciplined, or they showed self-discipline.

It它 describes a person or their way of living形容的是一個人，或他們的生活方式。It它 is not a verb不是動詞, so we do not say "I self-disciplined yesterday."所以我們不會說「I self-disciplined yesterday」。 We say someone is self-disciplined我們會說某人is self-disciplined, or they showed self-discipline或說他們展現了self-discipline。