CRISPR is a tool—how we use it defines its legacy.
The beauty of a mathematical proof is in its elegance and the way it reveals the underlying truth in a clear and concise manner.
The boy and his heart had become friends, and neither was capable now of betraying the other.
小规模养殖者是可持续水产养殖的支柱；他们的知识是不可替代的。
The story of a poor man's life is written on his body, in a sharp pen.