4.8%的house有pool，3.2%是塑料的。
大部分中产是没有pool的，维护，保险都挺贵。
There are 130 million households in the U.S., and an estimated 8% of homes have a swimming pool. Regarding the type of pool, nearly 59% of residential pools are in-ground while 41% are above ground.
【 在 zdzaba 的大作中提到: 】
: [upload=1][/upload]
: 对付不了关键字，凑合看把
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FROM 98.236.220.*