hard - seededness

• 硬实种子

hard - seededness的用法和样例：

例句

1. Hard seeds are very common in many species of legumes.
   硬实种子是豆科植物中普遍存在的现象。
2. Dormancy for hard seeds is caused by impermeability to water and gas and mechanical constraint of the seed coat.
   硬实种子种皮透水透气性差和对胚生长的机械限制，引起种子休眠。