| 单词 | curved surface |
| 例句 | DEFINITIVE EXAMPLES 权威例句〔caustic〕Of or relating to light emitted from a point source and reflected or refracted from a curved surface.焦散的：由一个点光源发出并从曲面反射或折射的光的或关于这种光的美国传统〔obsidian〕A usually black or banded, hard volcanic glass that displays shiny, curved surfaces when fractured and is formed by rapid cooling of lava.黑曜岩：火山玻璃，一般为黑色，带状，摔碎时色泽光亮，表面变曲，由火山熔岩迅速凝而成美国传统 |
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