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。
In times of adversity and change, we really discover who we are and what we're made of.
"Stories are the light that guides us through the darkness."
世界上最好和最美丽的东西是看不见甚至摸不到的——它们必须用心去感受。
"Mathematics is not about numbers, equations, computations, or algorithms: it is about understanding."