Last Updated：2025/11/20
Sentence
観測所の技術者は望遠鏡の感度を高めるために、老朽化した画像増倍管を注意深く交換した。
Quizzes for review
The observatory technician carefully replaced the aging image tube to improve the telescope's sensitivity.
See correct answer
The observatory technician carefully replaced the aging image tube to improve the telescope's sensitivity.
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