Essentials of marriage
[法] 婚姻的要件
?? 詞語組成解析
n. 要件, 概要；基本營養素；生活必需品（essential的復數）
of
[?v]
prep. 關于;屬于…的;由…制成;
aux. 助動詞 [非標準用語、方言] =have [主用于虛擬語氣];
??? 情景例句
It sets the tone for the whole show.
它決定了整個展覽的氣氛。
How did you get so dirty?
你為什么弄得這么臟？
That sounds like a good idea. I have a few friends I could ring to see if they're free.
聽起來是個好主意。我可以打電話給我的幾個朋友看看他們是否有空。