Chinese English

A system of COOR­DINATES in a HORIZONTAL PLANE used to describe the POSITIONS of points with respect to an arbitrary ORIGIN by means of two distances perpendicular to each other. The two REFERENCE LINES at right angles to each other passing through the ORIGIN are called the coordinate axes. The distances parallel to the true (or arbitrarily assigned) north-south axis are called the ordinates, or the y coordinates. The distances parallel to the true (or arbitrarily assigned) east-west axis are called the abscissae,or the x coordinates. The north and east directions are usually taken as positive, and the south and west directions are usually taken as negative. Also referred to as plane coordinates.

A system of COORDINATES used to describe the POSITION of a point in space with respect to an arbitrarily chosen ORIGIN by means of two DIRECTIONS and one distance; i.e., the vectorial angles and radius vector magnitude.

一种描述空间点位的坐标系统。它以任意选定的原点为基准，用两个方向和一个距离来确定点位，即两个矢量角和一个矢径值。

In PHOTOGRAMMETRY the term may refer to any general three-dimensional coordinate system used to define the POSITION of a point in the object space, as distinguished from the IMAGE of the same point on a PHOTOGRAPH.

A system of POLAR COORDINATES in which the ORIGIN is the centre of a sphere and the points all lie on the surface of a sphere. The POLAR AXIS of such a system cuts the sphere at its two POLES.

The COORDINATES of any point in a strip, whether on the GROUND or actually an AIR STATION, referred to the ORIGIN and axes of the air coordinate system of the first OVERLAP.

航线上任何点（无论是地面点还是实际空间点）的坐标。它们以首次重叠的空间坐标系统的原点和坐标轴为基准。

An instrument used to plot in terms of PLANE RECTANGULAR COORDINATES. It may be an integral part of a STEREOSCOPIC PLOTTING INSTRUMENT whereby the planimetric motions (x and y) of the FLOATING MARK are plotted directly.

一种根据平面直角坐标绘图的仪器。它可以看作立体测绘仪的一个组成部分，利用它可直接绘出浮游测标的平面运动（x和y)。

In PHOTOGRAMMETRY, the condition of EXPOSURE of a pair of PHOTOGRAPHS in which the two PHOTOGRAPHS lie in a common plane parallel to the AIR BASE. If the AIR BASE is horizontal, the PHOTOGRAPHS are said to be exposed in horizontal coplane.

在摄影测量学中，指像对的一种曝光条件，即两像片处在平行于航摄基线的同一平面上。如这个摄影基线是水平的，则称这两张像片是水平共面曝光像片。

The central or innermost part of anything. See CENTROSPHERE. In OCEANOGRAPHY, a vertical, cylindrical sample of the BOTTOM SEDIMENTS from which the nature and stratification of the BOTTOM may be determined. Also calledcore sampleor sediment core.

1.任何事物的中心或最内部部分。参见centrosphere（地核）。 2.在海洋学中，海底沉积物的竖直圆柱形标本，根据它可以确定海底底质的特性和分层，也称作core sample （岩芯样品）或sediment core（沉积岩心）。

The tubular section of a core sampling device. Bottom sediment samples are collected either directly in the core barrel or in a plastic liner placed inside it. Also called coring (or core) tube.

柱状样品采样装置的管状部分。采样时可直接用采样管采集海底沉积物样品，也可用采样管内部的塑料套装采集，亦称作coring (or core) tube（采样管）。

A device for obtaining a CORE; a hollow tube that is driven into the ocean floor. Also called coring instrument or coring device. See CORER: HYDROPLASTIC, CORER: PISTON, PIGGOT GUN and VACUUM LEAD.

通过一根空管插入海底获取岩芯样品的设备。也称作coring instrument 或coring device（岩芯取样器）。参见hydroplastic corer（氢化塑料取芯器）、piston corer（活塞式采样器）、piggot gun （皮戈特采泥枪）和vacuum lead（真空导管）。

A deep sea coring device, developed at the U.S. Naval Oceanographic Office, to obtain 3 1/2-inch diameter cores up to 12 FEET in length. The barrel is constructed of high-impact grade polyvinyl chloride plastic without an inner liner. Also called polyvinyl corer.

一种深海取芯装置，由美国海军海洋机构研制。它采集的样芯直径3.5英寸，长度可达12英尺。这种采集器用高强度的氯化聚乙烯塑料制成，内部没有套管。又称为polyvinyl corer。