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The course of development consists simply in this; that in each generation the two parental traits appear, separated and unchanged.

發展過程簡單來說就是：在每一代中，兩個親本性狀都會出現，分離且不變。

It is now clear that the hybrids form seeds which have the one or the other of the two differentiating characters.

現在已經清楚，雜種形成的種子具有兩個分化性狀中的一個或另一個。

Experiments on plant hybridization require the most careful attention and great patience.

植物雜交實驗需要最仔細的關注和極大的耐心。

Nature tends to produce constancy in all her works, but she does not always succeed.

大自然傾向于在她所有的作品中產生恒常性，但并不總是成功。

The uniformity of the hybrids in the first generation, the dissimilarity in the second, are facts which cannot escape the attention of an accurate observer.

第一代雜種的同一性，第二代的不相似性，是精確觀察者無法忽視的事實。

To live without experiencing some of the most beautiful relations life affords is not to have lived at all.

生活中沒有體驗過一些最美好的關系，就等于根本沒有生活過。

The development of the vital forms under the influence of external conditions is a subject of the highest importance.

外部條件影響下生命形式的發展是一個極其重要的課題。

It requires indeed some courage to undertake a labor of such far-reaching extent.

確實需要一些勇氣來承擔如此影響深遠的工作。

The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used.

任何實驗的價值和效用都取決于材料是否適合其使用的目的。

My scientific studies have afforded me great satisfaction; and I am convinced that it will not be long before the whole world acknowledges the results of my work.

我的科學研究給我帶來了極大的滿足；我深信，用不了多久，全世界都會承認我的工作成果。