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occulting bar造句

"occulting bar"是什么意思  
造句与例句手机版
  • Amateur observation is difficult because of the proximity of Titan to Saturn's brilliant globe and ring system; an occulting bar, covering part of the eyepiece and used to block the bright planet, greatly improves viewing.
  • It's difficult to see occulting bar in a sentence. 用occulting bar造句挺难的
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