Its egg developed a protective shell 它的卵进化出了一层保护性外壳
These farmers, in their yellow protective suits, 这些穿着黄色防护服的农民们
It forms a protective mantle against the cold, 它形成了抵御寒冷的保护性掩体
I don't want to lose my protective layer. 我可不想被洗掉保护皮