例句與造句

1. The suitable concentration of the selective agent kanamycin is 50mg . l - 1 . the duration of infection and co - culture with agrobacterium influences soybean transformation evidently
   農(nóng)桿菌侵染時間和共培養(yǎng)時間對大豆的轉(zhuǎn)化有明顯的影響，侵染時間以15min為宜，共培養(yǎng)時間以3d為宜。
2. It's difficult to find selective agent in a sentence. 用selective agent造句挺難的