| 单词 | principal object |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔background〕The part of a pictorial representation that appears as if it were in the distance and that provides relief for the principal objects in the foreground.远景：绘画表现的构成部分，看起来似乎在远处，为使在前景的主要物体形象更突出美国传统 |
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