dark field的用法和樣例：
例句
- For astrometric purposes, dark frame and flat field calibration is recommended.
出于天文測量要求，暗場(chǎng)圖和平場(chǎng)圖校準是被推薦的。 - The annular lens dark field vertical illumination system has been more and more applied in special microscopes.
環(huán)形透鏡暗場(chǎng)落射照明系統越來(lái)越多被應用在特型顯微鏡上。 - The spirals are not readily seen unless immunofluorescent stain or dark field illumination is employed.
螺旋體不易觀(guān)察除非在熒光顯微鏡或暗視野顯微鏡觀(guān)察。
