on the level   (TTS發音)

honest（ly）； truthful（ly）誠實；可靠

    I've known him all my life and you can believe me when I say he is on the level. 我從小就認識他，我說他誠實，你完全可以相信我。

    You can trust him because he always acts on the level. 你可以相信他，因為他辦事一向很公正。