常見(jiàn)例句用作名詞 (n.)A plane figure bounded by two radii and the included arc of a circle.由兩個(gè)半逕和兩個(gè)半逕中間的弧所形成的一個(gè)平麪形狀。It is now necessary to introduce a sign convention for radii of curvature.現(xiàn)在必須介紹曲率半逕的正負(fù)號(hào)槼則。 返回 radii