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top-notchadj.

英 tap'nɔtʃ | 美
中文adj. 一流的;拔尖的
词根词源
top-notch (adj.)also top notch, 1848, from top (adj.) + notch (n.). Figurative of the "highest point" of something, but the exact mechanical image is uncertain.
关键词
top-notch