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单词 line of fire
释义

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line of fire
a. Often used for ‘straight line’ (sense 9); esp. in Physics and technical, as in line of the apsides, line of distance, line of force, line of sight (for which see those words). line of fire (see quot. 1859).
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the world > relative properties > number > geometry > line > [noun] > straight
linec1400
straight1892
society > armed hostility > military equipment > operation and use of weapons > action of propelling missile > discharge of firearms > [noun] > line of fire
line of fire1859
firing line1918
c1400 Mandeville's Trav. (Roxb.) xx. 90 Þe lyne þat es betwene þise twa sternez departez all þe firmament in twa partes.
1559 W. Cuningham Cosmogr. Glasse 139 Marking diligentlye that the Center of the second Circle, be in the line of sighte.
1601 R. Dolman tr. P. de la Primaudaye French Acad. III. 116 By meanes of the shadowes, or visuall lines, representing the saide shadowes.
1814 J. Playfair Outl. Nat. Philos. II. ii. iii. 266 The forces which act upon a body..may be resolved into the directions of three lines or axes.
1825 ‘J. Nicholson’ Operative Mechanic Gloss. 778 Line of centres, a line drawn from the centre of one wheel to the centre of another when their circumferences touch each other.
1851 Official Descriptive & Illustr. Catal. Great Exhib. II. 319 Whenever the axis of a single lens comes in the line between the observers and the focus.
1859 ‘Stonehenge’ Shot-gun 314 The line of fire is the indefinite projection of the axis of the barrel.
1873 J. C. Maxwell Treat. Electr. & Magnetism I. 84 If a line be drawn whose direction at every point of its course coincides with that of the resultant force at that point, the line is called a Line of Force.
1897 Outing 30 250/1 Any number of players can take part..so long as they are not so crowded as to get into each other's line of play.
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更新时间:2024/11/11 0:37:01