not much of   (TTS發音)

not very good as不很好

    He is not much of a cook. 他不是個好廚師。

    I'm not much of a mechanic，I'm afraid，but I'll have a look at your car if you like. 我恐怕不是一個很熟練的技師，但如果你願意的話，我就看看你的汽車。