aggregate species造句

例句与造句

1. Where species form apomictic clones that are very difficult to distinguish from each other , they are termed aggregate species , e . g . bramble ( rubus fruticosus agg . )
   从单性生殖系产生的物种极为相似，几乎无法分辨，这被称为复合种。
2. It's difficult to find aggregate species in a sentence. 用aggregate species造句挺难的