胚胎早期败育是南丰蜜橘无核的主要原因。

It is hence proved that embryo degeneration is responsible for the seedless of Nanfeng tangerine.

我朋友向我推荐南丰工业中心，这大厦怎么样呢？

My friend recommended to me the Nan Fung Industrial Center. How is it?

测定结果表明，南丰蜜桔叶片中铁和锌的含量较高。

The results show that leaves of NanFeng sweet orange contain higher amount of iron and zinc.