2 sentences

1. 他从事水稻育种工作已经三十多年了。

   tā cóng​shì shuǐ​dào yù​zhǒng gōng​zuò yǐ​jīng sān​shí duō nián le.

   He has been working in rice breeding for over thirty years.

   Source: Dong Chinese Dictionary

2. 科学家们成功育种出一种抗虫害的棉花。

   kē​xué​jiā men chéng​gōng yù​zhǒng chū yī zhǒng kàng chóng​hài de mián​hua.

   Scientists have successfully bred a variety of pest-resistant cotton.

   Source: Dong Chinese Dictionary