ef

abbr.

efficiency 效率；equivalent focal length 等效焦距；expectant father 准爸爸；experimental flight 试飞

英英释义

Ef

• Ef (Ф ф; italics: Ф ф) is a Cyrillic letter, commonly representing the voiceless labiodental fricative , like the pronunciation of ⟨f⟩ in "fill". The Cyrillic letter Ef is romanized as ⟨f⟩.

以上来源于:Wikipedia

权威例句

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