not hurt a fly
无法伤害一只苍蝇
形容性格极其温和善良
英文释义
to be very gentle or nonviolent, not capable of harming anyone or anything
例句
Despite his tough appearance, he wouldn't hurt a fly and is actually very kind.
典故来源
源自16世纪英国谚语，用“连苍蝇都不伤害”比喻人极其温和无害。