立法機關的
同一場「代表齊聚」如果變成常設的、而且職責是制定法律，這個聚會就成了國會；congressional 也就跟著指這個機構。
of a legislature · adjective · C1
Relating to congress — the group of people who are chosen or elected to make the laws in some countries.
國會的；立法機關的
核心畫面
One way to see it: congressional is simply "belonging to a congress", and a congress is people who represent different groups coming together in one hall to talk and decide. All four uses are the same adjective; what changes is which coming-together is meant — a one-off meeting, a country's law-making body, the US one in particular, or a party that took the word as its name.
可以想成 congressional 就是「屬於某個 congress 的」，而 congress 的畫面是：各方代…更多收起
可以想成 congressional 就是「屬於某個 congress 的」，而 congress 的畫面是：各方代表從不同地方來到同一個場子裡開會、做決定。這四個意思其實是同一個形容詞，變的只是指哪一個「聚在一起」——一場代表大會、一個國家的立法機關、特指美國的那一個，或是拿 Congress 當黨名的政黨。（可以留意：這幾個分項其實是名詞 congress 的分項，congressional 本身只加了「…的」。）From the picture
黨名裡的 Congress
有些政黨成立時本身就是一場「全國代表大會」，於是把 Congress 留在名字裡；這時 congressional 指的是那個黨，而不是任何議會。
of a Congress political party · adjective · C1
Relating to a political party that has the word 'Congress' in its name, such as India's Congress Party.
國大黨的
Also in this word
of a congress (meeting) · adjective · C1
Relating to a congress — a large formal meeting where representatives of different groups meet to talk and make decisions.
代表大會的
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
Congressionaladj/kəŋˈɡɹɛʃn̩əl/
- 1
Of or pertaining to the United States Congress.
congressionaladj/kəŋˈɡɹɛ.ʃə.nəl/
- 1
governmentpoliticsOf or relating to a congress.
- That the Oath Keepers recording went uninvestigated by the FBI until after January 6 is an “additional piece of information that congressional investigators in particular on the January 6th committee and the other Homeland Security committees should be looking at to determine whether or not the FBI and other law enforcement organizations were doing enough on the prevention side,” Cordero told CNN’s Ana Cabrera on Tuesday.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。