大多数被子植物的胚珠有两层珠被，而裸子植物通常只有一层。
Most angiosperm ovules possess two integuments, while gymnosperms usually have only one.
垫珠被压进垫圈里，使得非常光滑的垫珠在垫圈里形成压扁密封。
The beads are driven into the washer allowing the polished beads to form a crush seal onto the washer.
随着时间的流逝，魔法产生可以收集的形式释放宝珠被倒下的单位。
Mana is generated over time and can be collected in the form of orbs that are released by fallen units.
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