如题所述
tough-as-nails 和hard as nails 意思相近。
直译为:坚韧的指甲。
引申为:冷酷无情或铁石心肠。
We had better then be as tough as nails. (我们最好要做到冷酷无情.)
He simply looked mean and hard as nails. (他看起来既卑鄙又冷酷无情。)
He's a shrewd businessman and hard as nails. (他是一个既精明又铁石心肠的生意人。)