不信你短短观察几天,就不如初次的印象好了。
现在很清楚,杂种形成的种子具有一个或另一个分化特征,其中一半再次发育成杂种形式,而另一半产生的植物保持恒定,并以相等的数量接受显性或隐性特征。
The chess-board is the world; the pieces are the phenomena of the universe; the rules of the game are what we call the laws of Nature.  
The more you read, the less you imitate.
"The past is a foreign country; they do things differently there."