be made of cardboard
表示某物由硬纸板制成；of 后面接材料名词。
The model house is made of cardboard.
这个模型房子是用硬纸板做的。
硬纸板；纸板
扁平之物；空洞的事物；非洲肉豆蔻；一种类似厚纸的木质材料,用于制造箱子、纸箱和标牌；一种坚硬且中等厚度的纸；平坦或空洞的事物
a stiff, thick paper material made from wood, used for making boxes, cartons, and signs
一种类似厚纸的木质材料,用于制造箱子、纸箱和标牌
A wood-based material resembling heavy paper, used in the manufacture of boxes, cartons and signs.
一种坚硬且中等厚度的纸
a stiff moderately thick paper
平坦或空洞的事物
Something flat or insubstantial.
非洲肉豆蔻(Pycnanthus angolensis)的同义词
Synonym of African nutmeg (“Pycnanthus angolensis”).
The movers wrapped the dishes in cardboard before packing them.
搬家工人把盘子用纸板包好后再装箱。
用法提示：“cardboard”作名词，表示用作包装材料的纸板。
A layer of cardboard under the mattress made the bed feel firmer.
床垫下垫了一层纸板，床就感觉更硬了。
用法提示：这里“cardboard”是不可数名词，指整片纸板。
She cut the cardboard into pieces and painted them for a school project.
她把纸板剪成小块并涂上颜料，用于学校作业。
用法提示：“cardboard”作物质名词，指可剪裁的纸板材料。
表示某物由硬纸板制成；of 后面接材料名词。
The model house is made of cardboard.
这个模型房子是用硬纸板做的。
计量硬纸板时用 piece、sheet 等量词。
She cut a piece of cardboard into a small square.
她把一块硬纸板剪成了一个小正方形。
cardboard 放在另一名词前作定语，说明该物的材质。
He stored his books in a cardboard box.
他把书存放在一个硬纸板箱里。
grammar · medium
易错句子I need a cardboard to protect the photo.
正确表达I need a piece of cardboard to protect the photo.
cardboard 作“纸板”这一材料义时是不可数名词，不能像汉语“一张纸板”那样直接用不定冠词 a 修饰；要计量需用 a piece of cardboard（或 some cardboard）。
grammar · medium
易错句子The box is made by cardboard.
正确表达The box is made of cardboard.
表示制成某物的原材料用 be made of（成品仍能看出材料），介词是 of；by 只用于引出动作的执行者，如 made by my father，所以这里不能用 by。
grammar · medium
易错句子I packed my books in paper boxes when I moved.
正确表达I packed my books in cardboard boxes when I moved.
汉语“纸箱”带“纸”字，但英语中结实、用来装东西搬家的箱子固定说 cardboard box；paper box 指用薄纸做的盒子（如礼品盒），不能表示这种硬纸箱。
纸板箱；硬纸盒
He packed all his books into a cardboard box.
他把所有的书都装进了一个纸板箱里。
瓦楞纸板
The packages were wrapped in thick corrugated cardboard.
这些包裹用厚厚的瓦楞纸板包着。
一张纸板
She taped a sheet of cardboard over the broken window.
她在破了的窗户上贴了一张纸板。
纸板筒；纸筒
The posters arrived rolled up inside a cardboard tube.
海报卷起来装在一个纸筒里送来了。
纸板剪影；纸板立牌
Tourists were taking photos next to a cardboard cutout of the singer.
游客们站在那位歌手的纸板立牌旁拍照。
Choose the next layer that will help you use cardboard with more confidence.
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纸板包装
The company switched to cardboard packaging to reduce plastic waste.
这家公司改用纸板包装以减少塑料垃圾。