Chinese English

A crumbling, earthy DEPOSIT, particularly one of CLAY mixed with SAND, lime, decomposed SHELLS, etc. Sometimes a LAYER of marl becomes quite compact. Part of the ocean bed is composed of marl.

A system introduced by Marsden early in the nineteenth century for showing the distribution of meteorological DATA on a CHART especially over the OCEANS. A Mercator map projection is used; the world between 90°N and 80°S being divided into Marsden 'squares' each of 10 degrees latitude by 10 degrees longitude. These squares are systematically numbered to indicate position. Each square may be divided into quarter squares, or into 100 one-degree subsquares numbered from 00 to 99 to give the position to the nearest degree.

马士顿第十九世纪引入的一种用于显示气象数据分布的海图，特别用于海洋气象数据。它采用墨卡托投影，将北纬90度至南纬80度之间区域按照经纬度10度X10度划分为马士顿方格。这些方格经过系统地编号以指示其位置。每个方格可以划分为四个方格，或划分为100个1度乘1度大小的小方格，编号依次是00至99，从而可以给出精度达到1°以内的位置。 

A mathematical representation, usually of a process, device, or concept, which per­mits mathematical manipula­tion of variables as a means to determine how the process, device, or concept would behave in various situations as e.g. the application of a specific simulation.

In OCEANOGRAPHY, ROCK or SEDIMENT in which larger grains are embedded in a mass of smaller grains. In printing, a metal plate, usually of copper, for moulding the face of a type. In graphic arts, a mold in which type characters are cast in line-casting machines and foundry type.