英语词汇“let fall”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	let fall
释义	let fall Geometry Draw (a perpendicular) from an outside point to a line.On the tangent PR produced let fall the perpendicular SY.... Let ABC be any triangle, and the angle at B one of its acute angles, and upon BC, one of the sides containing it, let fall the perpendicular. Their effects must be estimated by the length of perpendiculars let fall upon the lines of direction in a similar manner. See parent entry: let
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