名詞 cardboard:

1. a stiff moderately thick paper
   同義詞：composition board

形容詞 cardboard:

1. without substance
   同義詞：unlifelike

1. The string is wound round a cardboard cylinder.
   線纏繞在紙筒上。
2. The photograph was backed with cardboard.
   照片背面襯上了一層紙板。
3. Don't throw that cardboard box away it may come in handy.
   不要把那個紙盒丟掉--可能用得著。
4. It is a flimsy cardboard box.
   那是一個不結(jié)實的紙箱。

card.board

n.（名詞）
A material similar to thick, stiff paper, that is made of pressed paper pulp or pasted sheets of paper. It is used for making cartons and signs, for example.
卡紙板：一種類似厚硬紙板的材料，用壓制過的紙漿或粘貼的紙板做成。該材料用于做紙（板）盒和標志等
adj.（形容詞）
Made of or consisting of cardboard.
卡紙板做的：用卡紙板做的，由卡紙板組成的

Flimsy; insubstantial.
脆弱的：不結(jié)實的；不堅固的
Lacking depth; superficial:
膚淺的：缺乏深度的；淺薄的：
例句：
a movie with only cardboard caricatures of its historical subjects.
一部僅僅只對歷史主題作膚淺諷刺的電影