英语词汇“semi-major axis”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

semi-major axis n.

Brit.

/ˌsɛmɪmeɪdʒər ˈaksɪs/

U.S.

/ˌsɛˌmaɪˌmeɪdʒər ˈæksəs/

/ˌsɛmiˌmeɪdʒər ˈæksəs/

(also semi-minor axis) half of the length of the longest (shortest) diameter of an ellipse.

ΚΠ

1850 J. Haan Analytical Geom. & Conic Sections v. 45 The equation to the ellipse [is]..y²/b² + x²/a² = 1.., a and b being termed respectively the semi-axis major and the semi-axis minor.]

1899 J. H. Grace & F. Rosenberg Coordinate Geom. iv. 50 Find the length of the ordinates of each of the curves in Ex. 3 corresponding to the middle points of the semi-major axis.

1909 C. N. Schmall First Course Analyt. Geom. viii. 191 Prove that the semi-minor axis is a mean proportional between the parts of tangent cut off.

1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields iv. 175 A charge Q is uniformly distributed throughout the volume of an ellipsoid of revolution whose semi-major axis is a and whose semi-minor axes are b.

1977 Whitaker's Almanack 156/1 The squares of the periodic times vary as the cubes of the semi-major axes.

单词	semi-major axis
释义	> as lemmas semi-major axis semi-major axis n. Brit. /ˌsɛmɪmeɪdʒər ˈaksɪs/ , U.S. /ˌsɛˌmaɪˌmeɪdʒər ˈæksəs/ , /ˌsɛmiˌmeɪdʒər ˈæksəs/ (also semi-minor axis) half of the length of the longest (shortest) diameter of an ellipse. ΚΠ 1850 J. Haan Analytical Geom. & Conic Sections v. 45 The equation to the ellipse [is]..y²/b² + x²/a² = 1.., a and b being termed respectively the semi-axis major and the semi-axis minor.] 1899 J. H. Grace & F. Rosenberg Coordinate Geom. iv. 50 Find the length of the ordinates of each of the curves in Ex. 3 corresponding to the middle points of the semi-major axis. 1909 C. N. Schmall First Course Analyt. Geom. viii. 191 Prove that the semi-minor axis is a mean proportional between the parts of tangent cut off. 1962 D. R. Corson & P. Lorrain Introd. Electromagn. Fields iv. 175 A charge Q is uniformly distributed throughout the volume of an ellipsoid of revolution whose semi-major axis is a and whose semi-minor axes are b. 1977 Whitaker's Almanack 156/1 The squares of the periodic times vary as the cubes of the semi-major axes. extracted from semi-prefix < as lemmas
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> as lemmas