例句與造句

1. Contractile root a specialized root developed by certain bulb - and corm - forming plants that serve to pull the bulb or corm down to the appropriate depth in the soil , e . g . crocus
   收縮根：在某些具有形成鱗莖或球莖的植物中特化的根結(jié)構(gòu)。收縮根的作用是把形成的鱗莖或球莖定位于土壤的某一特定深度，例如番紅花屬的植物。
2. It's difficult to find contractile root in a sentence. 用contractile root造句挺難的