...A beautiful proof of thistruth is familiar to every user of a telescope...
Robert Stawell Ball 「The Story of the Heavens」
...It may be remarked that this lastadjustment is the proper work of the optician, since it is so difficultthat the user of the telescope cannot ordinarily effect it...
Simon Newcomb 「Side-lights on Astronomy and Kindred Fields of Popular Science」
ランダム例文:
便利!手書き漢字入力検索
時事ニュース漢字 📺