You can add materials to clay to gain desired results. For example, you can add sand to prevent tiny breaks or lines from forming in the finished product. But you should not use sand from the coasts surf (of ) oceans. Instead you should use sand from rivers or from other areas of land that are not near the sea.

       你可以在粘土中加入辅料以获得想要的效果。例如，可以在其中加入沙子以防止制作过程中出现细小的裂纹。但不可以加入海沙，取而代之的，你可以加入河沙或者产自内陆地区的沙子。

You can usually find good clay in low areas of islands or land, especially, if volcanoes helped form the land. Clay often exists in fields covered with some water. The clay will be found about 1 meter below the ground. River banks often also have clay about one meter or less under the surface.

       通常可以在岛屿或者陆地低地处发现好的粘土，尤其是那些在火山的作用下形成的陆地。粘土通常存在于覆有少量水的土地中，一般其位于地表 1 米 左右的地层中。而且，在位于河岸表面一米左右的土地中也会含有粘土。

You can recognize clay because it is very shining (shiny) when it is wet. You can also perform a test. Take some of the material and add enough water to it to make it seem like you are making bread. Then press it in you hand until it is about the size of an egg. It is probably clay if it holds together instead of falling apart when you stop pressing it.

       你可以很容易辨别粘土，因为潮湿的粘土是有光泽的。而且，你还可以做一个试验。取少量物质并加入足够的水，这个过程和你平时做面包的过程类似。然后在手中挤压它直到其形成鸡蛋大小。当你停止揉捏时，如果其黏在一起而不是散开，那么这个物质可能是粘土。

正确率： 96%

总结：

词汇：

Shiny:     A shiny surface is bright because it reflects light.

          Adj. 擦亮的 , 有光泽的 , 晴朗的 , 闪耀的 , 发亮的

Shining: to produce bright light

Adj. 光亮的 , 华丽的

因此，一个是一个是反射的光芒，一个是自发的，两个词不一样。

翻译：看似简单，不过感觉不够专业。 不知道学地质的看到这样一篇文章会怎么翻译？