安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
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- Thisissand
Thisissand is a unique playground for creating and sharing amazing sandscapes on your computer or mobile device Start pouring away to experience this special sand piling on your screen!
- Sand | Beach, Dune, Desert | Britannica
sand, mineral, rock, or soil particles that range in diameter from 0 02 to 2 mm (0 0008–0 08 inch) Most of the rock-forming minerals that occur on the Earth’s surface are found in sand, but only a limited number are common in this form Although in some localities feldspar, calcareous material, iron ores, and volcanic glass are dominant constituents of sand, quartz is by far the commonest
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