Spf
abbr. 防晒系数（Sun Protect Factor）；存储保护特征（Storage Protect Feature）
🏥 医学释义
荧光分光光度计
🗣️ 情景例句
I'm sorry. Really, I'm sorry.
我为你难过 真的为你难过。
He was involued with the Mafia.
他和黑手掌有牵连。
Textile business has become more and more difficult since the competition grew.
随着竞争的加剧，纺织品贸易越来越难做了。