现在很清楚,杂种形成的种子具有两个分化性状中的一个或另一个,其中一半再次发育成杂种形式,而另一半产生保持恒定并以相等数量接收显性或隐性性状的植物。
爱是唯一让生活可以忍受的东西,但它也是我们最大痛苦的来源。
The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
You can't have a better tomorrow if you're still thinking about yesterday.