现在已经清楚,杂种形成的种子具有两个分化性状中的一个或另一个。
It is now clear that the hybrids form seeds which have the one or the other of the two differentiating characters.
Mathematics is the art of asking the right questions and then finding their answers.
A good mathematician is someone who can see analogies between theorems; a great mathematician is someone who can see analogies between analogies.