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.
跨行业合作是解决我们在水产养殖中面临的复杂挑战的关键。
La realidad no es siempre probable, o verosímil.
不要盯着时钟,做它该做的事。继续前进。