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1. The hospital uses SPF-treated water to irrigate the plants.
这家医院使用经过SPF处理的水来灌溉植物。
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2. The product is SPF 50, which means it can protect against 98% of skin cancer.
该产品的SPF值是50，这意味着它可以预防98%的皮肤癌。
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3. The sunscreen has an SPF of 50, providing broad-spectrum protection from UVA and UVB rays.
这款防晒霜的SPF值为50，提供广谱防护，抵御UVA和UVB射线。