N an area of vacant ground used by children for playing baseball and other games 沙地; 用于儿童打棒球及玩其他游戏
If your soil does not contain a lot of sand, add a 3-inch layer of sand on top of the soil.
如果土壤含沙量不够，则需在土壤表面覆盖3英尺的细沙。
Still, three square feet of sand doesn't sound like a lot of beach.
尽管如此，走在3平方英尺的沙子上听起来并不像走在沙滩上。
A lot of rich land has changed into desert, leaving only sand.
许多肥沃的土地已经变成了沙漠，留下的仅是黄沙。
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