point centromere的用法和樣例：
例句
- The duplicates are attached to each other at a constricted region called the centromere.
對偶體彼此相連於稱為著絲粒的縮小的區域。 - The centromere contains the kinetochore, a structure involved in the attachment of the chromosomes to the spindle during nuclear division.
著絲點上包含了著絲粒，著絲粒確保細胞在分裂中染色體與紡錘體的整合，發生有序的染色體分離。
