| 1. | Red strains of delicious are being planted .
元帅的红色品系也有栽植。 |
| 2. | One laboratory stock of drosophila melanogaster has very reduced or vestigial wings .
果蝇的一种实验品系，翅膀缩小，称为残翅。 |
| 3. | Then the hybrids are allowed to self-copulate naturally, and several lines are established .
然后让杂种天然自交，这样就形成几个品系。 |
| 4. | Breeding of poultry on a scientific basis has created strains of uniform quality .
在科学基础上进行家禽育种，已创造了质量一致的品系。 |
| 5. | However, a considerable degree of caution should be taken in the use of any or all color strains .
但是，在应用某一个或全部着色品系时必需相当谨慎。 |
| 6. | First a strain with high lysine content is crossed with one having good yield characteristic .
首先把一个赖氨酸含量高的品系与一个具有丰产特性的品系相杂交。 |
| 7. | exchange did account for differences between two varieties of maize grown for a period of 30 days.
交换说明了已生长30天的两个玉米品系间的差异。 |
| 8. | The corvinus strain itself , which we learned
也就是考文李斯品系本身据我们所知 |
| 9. | The corvinus strain itself , which we learned . .
也就是考文李斯品系本身据我们所知. . |
