在马萨诸塞州，托儿中心必须为每三个婴儿聘请一名教师，其年均护理费用超过1.6万美元。
In Massachusetts, where childcare centers must hire one teacher for every three infants, the price of care averaged more than $16,000 per year.
他为每一个新结构聘请设计师和专家的费用感到沮丧。
He was frustrated by the cost of hiring designers and specialists for each new structure.
在密西西比州，中心必须为每五个婴儿聘请一名教师，护理费用平均不到5000美元。
In Mississippi, where centers must hire one teacher for every five infants, the price of care averaged less than $5,000.
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