at maturity

• (动物)成熟时期, (票据)到期

at maturity的用法和样例：

例句

1. An opening at definite places at maturity to release or expose the contents, such as seeds from a fruit or pollen from an anther.
   开裂，裂开到达成熟期时在一定的位置裂开的口子，以释放或显露出内含物，如从果实的裂口处释放出来的种子或从花粉囊中散发出的花粉