This principle of preservation, or the survival of the fittest, I have called natural selection. 查尔斯·达尔文.物种起源.
In this emergency it naturally occurred to my mind that a countryman of his own, on whom I could rely, might be the fittest person to help me. 威尔基·柯林斯.白衣女人.
You are young, Meg, but not too young to understand me, and mothers' lips are the fittest to speak of such things to girls like you. 路易莎·梅·奥尔科特.小妇人.
This process is called _Natural Selection_ or the _Survival of the Fittest_. 赫伯特·乔治·威尔斯.世界史纲.
But the expression often used by Mr. Herbert Spencer, of the Survival of the Fittest, is more accurate, and is sometimes equally convenient. 查尔斯·达尔文.物种起源.
The fittest man for a particular post is not always the best fellow or the most agreeable. 乔治·艾略特.米德尔马契.
And for the place of combat, I hold the fittest to be the lists of Saint George belonging to this Preceptory, and used by us for military exercise. 沃尔特·司各特.艾凡赫.
I had promised Mr. Franklin to speak to Rosanna, and this seemed the fittest time for keeping my word. 威尔基·柯林斯.月亮宝石.
He and Sherman are the fittest officers for large commands I have come in contact with. 尤利西斯·格兰特.U．S．格兰特的个人回忆录.