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	Term	术语	Definition	定义
	linear parallax	线性视差	See PARALLAX: ABSOLUTE STEREOSCOPIC.	参见absolute stereoscopic parallax(绝对立体视差)。
	linear scale	线性比例尺，直线比例尺	See SCALE: BAR.	参见bar scale(直线比例尺)。
	linear speed	线速度	See SPEED.	沿直线运动的速率。
	line of apsides	拱线	The line connecting the two orbital points (called apsides) that are nearest and farthest from the centre of attraction, as the PERIGEE and ... more The line connecting the two orbital points (called apsides) that are nearest and farthest from the centre of attraction, as the PERIGEE and the APOGEE in the case of an ORBIT about the EARTH, and the PERIHELION and the APHELION in the case of an ORBIT about the SUN.	两个轨道点（拱点）的连线，一个点距引力中心最近，一个点距引力中心最远。如关于地球的近地点和远�... more 两个轨道点（拱点）的连线，一个点距引力中心最近，一个点距引力中心最远。如关于地球的近地点和远地点，关于太阳轨道的近地点和远地点。
	line of collimation	视准轴（线）	See COLLIMATION.	通过望远镜物镜光学中心和十字线的直线。也称为 line of sight，pointing line ，aiming line of the instrument。
	line of constant scale	等比例线	Any line on a PHOTOGRAPH which is parallel to the TRUE HORIZON or to the ISOMETRIC PARALLEL.	像片上平行于真地平或等比线的线。
	line of delimitation	定界线	A line drawn on a map or chart depicting the separation of any type of maritime jurisdiction.	绘制在地图上或海图上描述任何类型海事管辖权的分界线。
	line of equidistance	等距线	See MEDIAN LINE.	参见median line（中线）。
	line of flow	流向线	The vector line showing the DIRECTION OF CURRENT at a given TIME. Also called STREAMLINE.	表示给定时间潮流流向的矢量线。也称为streamline（流线）。
	line of force	力线	A line indicating the direction in which a force acts, as in a MAGNETIC FIELD. See MAGNETIC LINES OF FORCE.	表示力作用方向的线，例如在磁场中的磁力线。参见magnetic lines of force（磁力线）。
	line of levels	水准线	A continuous series of measured differences of ELEVATION.	一系列连续测量出的高程差。
	line of nodes	交点线	The straight line connecting the two points of intersection of the ORBIT of a PLANET, PLANETOID, or COMET and the ECLIPTIC, or the line of i... more The straight line connecting the two points of intersection of the ORBIT of a PLANET, PLANETOID, or COMET and the ECLIPTIC, or the line of intersection of the planes of the ORBITS of a SATELLITE and its primary. See NODE.	连接行星、小行星或彗星轨道与黄道相交的两点的直线，或是卫星轨道平面与其行星轨道相交的线。参见no... more 连接行星、小行星或彗星轨道与黄道相交的两点的直线，或是卫星轨道平面与其行星轨道相交的线。参见node(交点)。
	line of position	位置线	A line indicating a series of possible POSITIONS of a craft, determined by OBSERVATION or measurement. Also called position line. See CELEST... more A line indicating a series of possible POSITIONS of a craft, determined by OBSERVATION or measurement. Also called position line. See CELESTIAL LINE OF POSITION, CIRCLE OF POSITION, COURSE LINE, ELECTRONIC LINE OF POSITION, FIX, HYPERBOLIC LINE OF POSITION, LATITUDE LINE, LEADING LINE, LONGITUDE LINE, RETIRED LINE OF POSITION, SONIC LINE OF POSITION, SPEED LINE, SUMNER LINE, SURFACE OF POSITION, VISUAL LINE OF POSITION.	表示飞机或船舶一系列可能位置的线，由观测或测量确定。也称为position line。参见celestial line of position(天�... more 表示飞机或船舶一系列可能位置的线，由观测或测量确定。也称为position line。参见celestial line of position(天文位置线), circle of position(船位圈), course line(航线), electronic line of position(电子测位线), fix(定点), hyperbolic line of position(双曲线位置线), latitude line(纬度线), leading line(叠标线), longitude line(经度线), retired line of position(后移位置线), sonic line of position(声测位置线), speed line(速度线), sumner line(萨姆纳线), surface of position(位置面), visual line of position(目视位置线)。
	line of sight	视准线，视线	The straight line between two points. This line is in the direction of a GREAT CIRCLE, but does not follow the curvature of the EARTH. See a... more The straight line between two points. This line is in the direction of a GREAT CIRCLE, but does not follow the curvature of the EARTH. See also COLLIMATION: LINE OF.	两点间的直线。该线指向大圆方向，但是不沿着地球曲率面。亦可参见line of collimation(视准轴)。
	line of sounding	测深线	A series of SOUNDINGS along a predetermined line, and at stated intervals, when SURVEYING. Also referred to as sounding line. See CHECK LINE... more A series of SOUNDINGS along a predetermined line, and at stated intervals, when SURVEYING. Also referred to as sounding line. See CHECK LINES, CROSS LINES, CROSS-SECTION LINES, INTER LINE, SPLIT LINE, STARRED LINES, TRACK LINE OF SOUNDING, SYSTEMS OF SOUNDING LINES.	当测量时沿预先设定的线以一定间隔进行的一系列测深。也可指测深索。参见check lines(水深检查线), cross li... more 当测量时沿预先设定的线以一定间隔进行的一系列测深。也可指测深索。参见check lines(水深检查线), cross lines(横交测深线), split line(加密测深线), starred lines(星形测深线), track line of sounding(巡航测深线), systems of sounding lines(巡航测深线)。
	line spacing	测深间距	Distance between sounding lines. Spacing usually depends on the type of survey, the instruments used, and the demanded accuracy.	测深线间的距离。间距通常取决于测量的类型、所使用的仪器和要求的精度。
	line squall	线飑	SQUALL which occurs along a SQUALL LINE.	沿飑线发生的飑。
	lipper	小浪花，微波海面	Slight ruffling or roughness on a water surface. Light spray from small WAVES. Also called leaper.	水面微皱或不平。小波浪引起的小浪花。也称作leaper（小浪花）。
	liquid compass	液体罗经	See COMPASS.	一种磁罗经，它的罗经盒内盛满液体以减少盘的振动。有时也称为spirit compass或wet compass(液体罗经)。
	list	倾向一方，侧倾，横倾	INCLINATION to one side, as of a vessel until she has found EQUILIBRIUM in an inclined position. Listing is a static condition, as disting... more INCLINATION to one side, as of a vessel until she has found EQUILIBRIUM in an inclined position. Listing is a static condition, as distinguished from heeling which is dynamic. See HEEL.	船向一侧倾斜，直至在倾斜位置达到平衡为止。是静止的侧倾状态，与倾斜的动态状态是有区别的。参见he... more 船向一侧倾斜，直至在倾斜位置达到平衡为止。是静止的侧倾状态，与倾斜的动态状态是有区别的。参见heel（横倾）。
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