| 单词 | strobe disc | 
| 释义 | > as lemmasstrobe disc   strobe disc  n. a disc with alternate light and dark sectors of equal size for checking the speed of rotation of something, its appearance being steady only when this speed is related in a definite way to the periodicity of the illumination. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > instruments for observing > 			[noun]		 > stroboscope or oscilloscope stroboscope1896 oscilloscope1922 strobe1942 strobe disc1942 1942    Amer. Cinematographer Sept. 423/1  				Check the strobe disc for synchronization. 1967    Nature 23 Dec. 1173/1  				The correct speed of a gramophone turn-table may be checked by viewing a strobe disk illuminated by electric light supplied by the a.c. mains. < as lemmas | 
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