油桐选优去劣是防止品种退化、实现油桐良种化的主要途径。

To select the improved varieties of Tung trees is a main approach to prevent the breed from degenerating.

youdao

油桐选优去劣是防止品种退化、实现油桐良种化的主要途径。

To select the improved varieties of Tung trees is a main approach to prevent the breed from degenerating.

youdao