名词
中文翻译：防晒系数
同义词：
['sun protection factor', 'sun protection factor']
例句：
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1. The sun protection factor of this product is very high.
这款产品的防晒系数非常高。
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2. To protect your skin from the sun, apply sunscreen with an SPF of at least 30.
为了保护皮肤免受太阳伤害，请使用至少SPF 30的防晒霜。
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3. She applied sunscreen with an SPF of 50 to her face before going out in the sun.
她在外出晒太阳前，将SPF 50的防晒霜涂在脸上。