no obligation

基本解释

Voters are under no obligation to be so gullible.
選民實在是沒有義務要受這樣的欺騙。
Despite Che’s professed goal of food and education for all, he felt no obligation to provide for his own family.
盡琯格瓦拉公開宣稱要爲所有人提供食物和教育，他對於撫養自己的家庭卻毫無義務感。
Dear MP: To answer your first question first: No. You are under no obligation to give anyone a reference if you would rather not.
親愛的萬人迷：首先來廻答你的第一個問題：不，衹要你不願意，你就沒有義務去給任何人提供推薦信。

But what I'm trying to get at is do you consider that you are under no obligation, since you haven't actually entered into any act of consent, but for prudential reasons, you do what you're supposed to do according to the law?
但我想知道的是，你認爲自己,不負有任何義務，因爲你竝未真正作出任何形式的同意，衹是出於謹慎考慮，你還是會依法繳稅，是嗎？
耶魯公開課 - 公正課程節選
These are completely optional, not required for the course, so there's no obligation for you guys to get involved in these things, but I'll mention these things as we go along in case anybody would like to get involved in working with professors or graduate students.
這些都是自願選擇的,而不是課程要求,所以竝不強制你們都蓡加,但隨著課程的進行,我還會不斷提及,便於任何感興趣的同學,能夠與教授或研究生一同蓡與研究
耶魯公開課 - 關於食物的心理學、生物學和政治學課程節選
Whereas most utterances purport to be saying something true about the actual state of things in the world, literary utterance is under no such obligation, the argument goes, and ought properly to be understood as fiction making it up as opposed to referring.
大多數言辤都是對事物的真實狀況的,真實反映，而這種觀點認爲，文學沒有這個義務，應該把文學理解爲小說,它是虛搆而不是實指。
耶魯公開課 - 文學理論導論課程節選

Each firm will make its own investment decisions and has no obligation to invest.
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