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3-D [noun]
This is a 3-D printer.
这是一台3D打印机。
三维电影
先理解核心含义，再看它在真实句子里的用法。
三维电影
a movie with images having a three-dimensional form or appearance
This is a 3-D printer.
这是一台3D打印机。
abbr. 三维的(three dimensional)
n. a movie with images having three dimensional form or appearance；n. having a three-dimensional form or appearance
I watched a 3-D movie last night and it felt like the actors were right in front of me.
我昨晚看了一部三维电影，感觉演员就在我面前。
This printer can create 3-D models layer by layer.
这台打印机可以逐层创建三维模型。
The 3-D effect in the video game made the virtual world look incredibly real.
电子游戏中的三维效果让虚拟世界看起来极其真实。
This is a 3-D printer.
这是一台3D打印机。
The film was released in 3-D.
这部电影以3D形式发行。
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作为名词通常指三维电影或三维效果，常与冠词a连用表示一部三维电影。
Dictionary facts from ECDICT, WORDNET.