reproducing kernel

例句：

1. 1. The scientist discovered a new reproductive kernel that could double crop yields.
   科学家发现了一种新的繁殖核，可以翻倍提高作物产量。
2. 2. The research team focused on the reproductive kernel to improve its efficiency.
   研究团队专注于繁殖核以提高其效率。
3. 3. The genetic engineers were working on developing a reproductive kernel that could resist disease.
   遗传工程师们正在努力开发一种能够抵抗疾病的繁殖核。