椭圆曲线的算术是数论中更深层结构的一个缩影。
The arithmetic of elliptic curves is a microcosm of the deeper structures in number theory.
生命是一种通过性传播的致命疾病。
The fundamental point in fabricating a chain reacting machine is of course to see to it that each fission produces a certain number of neutrons and some of these neutrons will again produce fission.