“ring sight”的概念、定义、翻译、参考文献-科学参考

单词	ring sight
释义	ring sight [`riŋ ´sīt] ^ORDNANCE A sight, especially a gunsight, in the shape of a ring or concentric rings, through which aim is taken and range is estimated.
随便看	operational game operational label operational maintenance operational standby program operational unit operational weather limits operation analysis operation analysis chart operation breakdown operation code operation cycle operation decoder operation number operation part operation process chart operation register operations research operations sequence operation time operative ankylosis operator operator algebra operator hierarchy operator interrupt operator process chart

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