Chinese English

在计算机系统中，指通过平面上的移动而实现操作的指向装置。亦可参见cursor（光标），joystick（操纵杆）。

Pelagic or terrigenous detrital material consi­sting mostly of silt and clay-sized particles (less than 0.06 millimetre) but often containing varying amount of SAND and/or organic mate­rials. It is a gene­ral term applied to any sticky fine-grained SEDI­MENT whose exact size classification has not been determi­ned.

远海或陆地的碎屑物质，主要由淤泥和粘土颗粒（小于0.06毫米）组成，但常含有不同数量的沙和（或）有机物质。任何确切尺寸分类还未确定的粘性细颗粒沉积物的通用术语。

A reddish-brown terrigenous deep-sea MUD which accumu­lates on the SEAFLOOR in the neighbour­hood of deserts and off the MOUTHS of great RIVERS; con­tains calcium carbonate up to 25 per cent.

A type of SWATH(E) SOUNDING SYSTEM in which the equipment emits a timed PULSE of sound that is narrow in the fore-aft direction and wide in the across track direction.  The reflected sound is received by several RECEIVERs arranged as an ARRAY.  By use of SIGNAL processing of the SIGNAL received at combinations of the RECEIVERS a much larger number, potentially many hundreds, of ACOUSTIC receive BEAM angles are formed.  For each receive BEAM the time interval between emission and reception of the reflected sound is converted into a RANGE.  Geometry is then used to convert each RANGE and receive BEAM angle to DEPTHs and also to position these DEPTHs within the SWATH(E) on the SEAFLOOR.  MBES systems may also be referred to as beam-formers.

在回波测深中，继首次回波后所收到的其他回波，源自声波在海底与海面间的多重反射。这些反射通常会显示在普通指示器的度盘或曲线记录器的回波图上，有时会把这种回波误认为是首次回波。

有两个或两个以上光轴按固定角度系统化安置的镜头，能够在所有暗箱内同时曝光以拍摄广阔范围的摄影机。

An instrument which comprises six WATER BOTTLES arranged so that they trip and take WATER SAMPLES at different selected DEPTHS from a vessel under way.

In PHOTOGRAM­METRY, an instrument for making a TOPOGRA­PHIC MAP from AERIAL PHOTOGRAPHS. A three-dimensional optical model of the TERRAIN to be mapped is produced, in miniature, by direct optical PROJEC­TION from a pair of overlapping PHOTOGRAPHS. This instrument uses the ANAGLYPH principle.

在摄影测量学中，指根据航摄像片制作地形图的仪器。该仪器利用互补色原理，通过对一组重叠像片的直接光学投影，制成地形图的小型光学立体模型。

A remote-sensing device which is capable of recording data in the ultraviolet and visi­ble portions of the electromagnetic spectrum, as well as the infrared.

In PHOTOGRAMMETRY, the point at which a vertical line through the PERSPECTIVE CENTRE of the camera lens pierces the plane of the PHOTOGRAPH. Also called nadir point,or plumb point.

在摄影测量学中，指铅垂线通过照相机透镜的透视中心穿向像片平面的那一点。亦称nadir point（天底点）或plumb point（像底点）。