“刚硬的”用英语怎么说

单细胞 无核原生物,具简单的细胞、刚硬的细胞壁和(能动型的)的鞭毛.A single - celled or multicellular organism whose cells contain a distinct membrane - bound nucleus.我们的内心经过180度的转变,神的爱软化了我们刚硬的心灵.Our heart takes a 180 degree turn as God's love melt...