second filial (F2) generation

Clone selection and application in the second generation seed-orchard of Pinus massoniana;

马尾松第二代种子园建园无性系选育及应用

One-Parent Progeny Test and Combined Selection of the Second Generation Seed Orchard of Cunninghamia lanceolata

杉木第二代种子园单亲子代测定及联合选择

It is best to establish second-generation orchards on a deliberate step-wise time scale.

对于营建第二代种子园，最好就是深思熟虑，按部就班。

Selecting the Materials of Establishing the First Generation of Improved Clone Seed Orchard of Masson Pine

马尾松第一代改良无性系种子园建园材料选择

Investigation on the timber tree period of the first generation fir seed orchard progeny forest in the Paiya Mountain Forest Farm

排牙山林场杉木第1代种子园子代林成材期调查

Genetic Variation for Growth Traits of Family Progeny Young Forest in the Second Generation Seed Orchard of Chinese Fir

杉木二代种子园家系子代幼林生长性状遗传变异

This interaction can produce gamma rays or secondary protons.

这种互相作用能够产生γ射线或第二代质子。

This interaction can produce gramma rays on secondary protons.

这种互相作用能够产生r射线或第二代质子。

Victory gardens

第二次世界大战时英国城市居民所种的菜园

Wood Property Analysis on Different Clones for Pulpwood in Clonal Seed Orchard of Pinus Massoniana

马尾松1.5代无性系种子园材性分析

HP: Well, go into second position with your children.

好的，和的孩子一起进入第二种位置。

Tony was seeded number two.

托尼被定为第二号种子选手。

In 1954 the first experimental seed orchards were planted.

到1954年，第一批实验性种子园建立起来了。

Inspect about Xian-cha's Writing on Porcelains for Hong-dian and His Disciples

图说仙槎为红店及弟子代笔种种(二)

An Analysis for Progeny Test of Half-sibs from Chinese Fir Clonal Seed Or chad

杉木种子园单亲本子代测定结果的分析

The Analysis of Offspring Genetic Variation and Stability in Clones Seed Orchard of Pinus Tabuleaformis Carr

油松种子园子代遗传变异及其稳定性分析

Progeny Variation and Genetic Stability of Pinus tabulaeformis in Clone Seed Orchard

油松种子园子代变异和遗传稳定性的分析

F1 The first filial generation; i.e. the first generation that results from a particular cross.

子一代（杂种一代）：杂交第一代，也就是一个特定杂交产生的第一代。

"Second day! Yes, second day," repeated the lady, with an air of impatience.

“第二天！是的，第二天，”那女子重复道，带着一种很不耐烦的神气。